1216693296 has 120 divisors (see below), whose sum is σ = 4190877600. Its totient is φ = 320882688.

The previous prime is 1216693249. The next prime is 1216693319. The reversal of 1216693296 is 6923966121.

It is a nude number because it is divisible by every one of its digits.

It is an unprimeable number.

It is a polite number, since it can be written in 23 ways as a sum of consecutive naturals, for example, 33321 + ... + 59528.

It is an arithmetic number, because the mean of its divisors is an integer number (34923980).

Almost surely, 2^1216693296 is an apocalyptic number.

1216693296 is a gapful number since it is divisible by the number (16) formed by its first and last digit.

It is an amenable number.

1216693296 is an abundant number, since it is smaller than the sum of its proper divisors (2974184304).

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

1216693296 is a wasteful number, since it uses less digits than its factorization.

1216693296 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 92883 (or 92874 counting only the distinct ones).

The product of its digits is 209952, while the sum is 45.

The square root of 1216693296 is about 34881.1309449679. The cubic root of 1216693296 is about 1067.5634709705.

The spelling of 1216693296 in words is "one billion, two hundred sixteen million, six hundred ninety-three thousand, two hundred ninety-six".