1216982272 has 36 divisors (see below), whose sum is σ = 2650054176. Its totient is φ = 553172480.

The previous prime is 1216982231. The next prime is 1216982293. The reversal of 1216982272 is 2722896121.

It is a congruent number.

It is an unprimeable number.

It is a polite number, since it can be written in 3 ways as a sum of consecutive naturals, for example, 213268 + ... + 218899.

It is an arithmetic number, because the mean of its divisors is an integer number (73612616).

Almost surely, 2^1216982272 is an apocalyptic number.

It is an amenable number.

1216982272 is an abundant number, since it is smaller than the sum of its proper divisors (1433071904).

It is a pseudoperfect number, because it is the sum of a subset of its proper divisors.

1216982272 is an equidigital number, since it uses as much as digits as its factorization.

1216982272 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 432194 (or 432180 counting only the distinct ones).

The product of its digits is 48384, while the sum is 40.

The square root of 1216982272 is about 34885.2729959219. The cubic root of 1216982272 is about 1067.6479830388.

The spelling of 1216982272 in words is "one billion, two hundred sixteen million, nine hundred eighty-two thousand, two hundred seventy-two".