312977388 has 18 divisors (see below), whose sum is σ = 730423596. Its totient is φ = 104305368.

The previous prime is 312977369. The next prime is 312977389. The reversal of 312977388 is 883779213.

It is not an unprimeable number, because it can be changed into a prime (312977389) 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 5 ways as a sum of consecutive naturals, for example, 58731 + ... + 63837.

Almost surely, 2^312977388 is an apocalyptic number.

It is an amenable number.

312977388 is an abundant number, since it is smaller than the sum of its proper divisors (417446208).

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

312977388 is an frugal number, since it uses more digits than its factorization.

312977388 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 10221 (or 5112 counting only the distinct ones).

The product of its digits is 508032, while the sum is 48.

The square root of 312977388 is about 17691.1669485085. The cubic root of 312977388 is about 678.9497831092.

Multiplying 312977388 by its sum of digits (48), we get a square (15022914624 = 122568²).

The spelling of 312977388 in words is "three hundred twelve million, nine hundred seventy-seven thousand, three hundred eighty-eight".