How many months equal 1 billion seconds?
Around here where I am, a month can be 28 days, 29 days, 30
days, or 31 days.
1 billion seconds is equal to . . .
-- 413.36 months of 28 days each
-- 399.11 months of 29 days each
-- 385.80 months of 30 days each
-- 373.36 months of 31 days each
-- 31.69 years.
(All are rounded.)