1216726304 has 24 divisors (see below), whose sum is σ = 2397185280. Its totient is φ = 607917376.

The previous prime is 1216726283. The next prime is 1216726307. The reversal of 1216726304 is 4036276121.

It is a Harshad number since it is a multiple of its sum of digits (32).

It is not an unprimeable number, because it can be changed into a prime (1216726307) by changing a digit.

It is a polite number, since it can be written in 3 ways as a sum of consecutive naturals, for example, 32837 + ... + 59259.

It is an arithmetic number, because the mean of its divisors is an integer number (99882720).

Almost surely, 2^1216726304 is an apocalyptic number.

It is an amenable number.

1216726304 is a deficient number, since it is larger than the sum of its proper divisors (1180458976).

1216726304 is a wasteful number, since it uses less digits than its factorization.

1216726304 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 27872 (or 27864 counting only the distinct ones).

The product of its (nonzero) digits is 12096, while the sum is 32.

The square root of 1216726304 is about 34881.6040915552. The cubic root of 1216726304 is about 1067.5731249554.

The spelling of 1216726304 in words is "one billion, two hundred sixteen million, seven hundred twenty-six thousand, three hundred four".