312321980 has 12 divisors (see below), whose sum is σ = 655876200. Its totient is φ = 124928784.

The previous prime is 312321949. The next prime is 312321983. The reversal of 312321980 is 89123213.

It is a super-2 number, since 2×312321980² = 195090038382240800, which contains 22 as substring.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (312321983) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (17) of ones.

It is a polite number, since it can be written in 3 ways as a sum of consecutive naturals, for example, 7808030 + ... + 7808069.

It is an arithmetic number, because the mean of its divisors is an integer number (54656350).

Almost surely, 2^312321980 is an apocalyptic number.

It is an amenable number.

312321980 is an abundant number, since it is smaller than the sum of its proper divisors (343554220).

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

312321980 is a wasteful number, since it uses less digits than its factorization.

312321980 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 15616108 (or 15616106 counting only the distinct ones).

The product of its (nonzero) digits is 2592, while the sum is 29.

The square root of 312321980 is about 17672.6336464037. The cubic root of 312321980 is about 678.4755208391.

The spelling of 312321980 in words is "three hundred twelve million, three hundred twenty-one thousand, nine hundred eighty".