312808990 has 32 divisors (see below), whose sum is σ = 608088096. Its totient is φ = 115171200.

The previous prime is 312808981. The next prime is 312809009. The reversal of 312808990 is 99808213.

It is a Smith number, since the sum of its digits (40) coincides with the sum of the digits of its prime factors. Since it is squarefree, it is also a hoax number.

It is a congruent number.

It is an unprimeable number.

It is a pernicious number, because its binary representation contains a prime number (13) of ones.

It is a polite number, since it can be written in 15 ways as a sum of consecutive naturals, for example, 45265 + ... + 51715.

It is an arithmetic number, because the mean of its divisors is an integer number (19002753).

Almost surely, 2^312808990 is an apocalyptic number.

312808990 is a deficient number, since it is larger than the sum of its proper divisors (295279106).

312808990 is a wasteful number, since it uses less digits than its factorization.

312808990 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 6844.

The product of its (nonzero) digits is 31104, while the sum is 40.

The square root of 312808990 is about 17686.4069273553. The cubic root of 312808990 is about 678.8279912461.

The spelling of 312808990 in words is "three hundred twelve million, eight hundred eight thousand, nine hundred ninety".