312921804 has 48 divisors (see below), whose sum is σ = 792028160. Its totient is φ = 95584320.

The previous prime is 312921797. The next prime is 312921823. The reversal of 312921804 is 408129213.

It is a super-2 number, since 2×312921804² = 195840110837228832, which contains 22 as substring.

It is an unprimeable number.

It is a polite number, since it can be written in 15 ways as a sum of consecutive naturals, for example, 14469 + ... + 28899.

Almost surely, 2^312921804 is an apocalyptic number.

It is an amenable number.

It is a practical number, because each smaller number is the sum of distinct divisors of 312921804, and also a Zumkeller number, because its divisors can be partitioned in two sets with the same sum (396014080).

312921804 is an abundant number, since it is smaller than the sum of its proper divisors (479106356).

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

312921804 is a wasteful number, since it uses less digits than its factorization.

312921804 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 14590 (or 14588 counting only the distinct ones).

The product of its (nonzero) digits is 3456, while the sum is 30.

The square root of 312921804 is about 17689.5959252890. The cubic root of 312921804 is about 678.9095874694.

The spelling of 312921804 in words is "three hundred twelve million, nine hundred twenty-one thousand, eight hundred four".