312989728 has 24 divisors (see below), whose sum is σ = 616995792. Its totient is φ = 156292416.

The previous prime is 312989707. The next prime is 312989753. The reversal of 312989728 is 827989213.

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, 20551 + ... + 32377.

It is an arithmetic number, because the mean of its divisors is an integer number (25708158).

Almost surely, 2^312989728 is an apocalyptic number.

It is an amenable number.

312989728 is a deficient number, since it is larger than the sum of its proper divisors (304006064).

312989728 is a wasteful number, since it uses less digits than its factorization.

312989728 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 12664 (or 12656 counting only the distinct ones).

The product of its digits is 435456, while the sum is 49.

The square root of 312989728 is about 17691.5157066883. The cubic root of 312989728 is about 678.9587061502.

The spelling of 312989728 in words is "three hundred twelve million, nine hundred eighty-nine thousand, seven hundred twenty-eight".