1216912160 has 48 divisors (see below), whose sum is σ = 2881339776. Its totient is φ = 485683968.

The previous prime is 1216912157. The next prime is 1216912187. The reversal of 1216912160 is 612196121.

It is an unprimeable number.

It is a polite number, since it can be written in 7 ways as a sum of consecutive naturals, for example, 65867 + ... + 82293.

It is an arithmetic number, because the mean of its divisors is an integer number (60027912).

Almost surely, 2^1216912160 is an apocalyptic number.

1216912160 is a gapful number since it is divisible by the number (10) formed by its first and last digit.

It is an amenable number.

1216912160 is an abundant number, since it is smaller than the sum of its proper divisors (1664427616).

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

1216912160 is a wasteful number, since it uses less digits than its factorization.

1216912160 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 16905 (or 16897 counting only the distinct ones).

The product of its (nonzero) digits is 1296, while the sum is 29.

The square root of 1216912160 is about 34884.2680874918. The cubic root of 1216912160 is about 1067.6274797621.

The spelling of 1216912160 in words is "one billion, two hundred sixteen million, nine hundred twelve thousand, one hundred sixty".