312499328 has 16 divisors (see below), whose sum is σ = 622557510. Its totient is φ = 156249600.

The previous prime is 312499309. The next prime is 312499351. The reversal of 312499328 is 823994213.

It can be written as a sum of positive squares in only one way, i.e., 251159104 + 61340224 = 15848^2 + 7832^2 .

It is a tau number, because it is divible by the number of its divisors (16).

It is an unprimeable number.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 1220573 + ... + 1220828.

Almost surely, 2^312499328 is an apocalyptic number.

It is an amenable number.

312499328 is a deficient number, since it is larger than the sum of its proper divisors (310058182).

312499328 is an equidigital number, since it uses as much as digits as its factorization.

312499328 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 2441415 (or 2441403 counting only the distinct ones).

The product of its digits is 93312, while the sum is 41.

The square root of 312499328 is about 17677.6505226232. The cubic root of 312499328 is about 678.6039177247.

The spelling of 312499328 in words is "three hundred twelve million, four hundred ninety-nine thousand, three hundred twenty-eight".