312720164 has 24 divisors (see below), whose sum is σ = 579015360. Its totient is φ = 147371616.

The previous prime is 312720113. The next prime is 312720169. The reversal of 312720164 is 461027213.

It is not an unprimeable number, because it can be changed into a prime (312720169) by changing a digit.

It is a polite number, since it can be written in 7 ways as a sum of consecutive naturals, for example, 4529 + ... + 25415.

It is an arithmetic number, because the mean of its divisors is an integer number (24125640).

Almost surely, 2^312720164 is an apocalyptic number.

It is an amenable number.

312720164 is a deficient number, since it is larger than the sum of its proper divisors (266295196).

312720164 is a wasteful number, since it uses less digits than its factorization.

312720164 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 21107 (or 21105 counting only the distinct ones).

The product of its (nonzero) digits is 2016, while the sum is 26.

The square root of 312720164 is about 17683.8956115444. The cubic root of 312720164 is about 678.7637312820.

Adding to 312720164 its reverse (461027213), we get a palindrome (773747377).

The spelling of 312720164 in words is "three hundred twelve million, seven hundred twenty thousand, one hundred sixty-four".