312713730 has 64 divisors (see below), whose sum is σ = 953038080. Its totient is φ = 71476992.

The previous prime is 312713717. The next prime is 312713767. The reversal of 312713730 is 37317213.

It is a Harshad number since it is a multiple of its sum of digits (27).

It is a junction number, because it is equal to n+sod(n) for n = 312713694 and 312713703.

It is an unprimeable number.

It is a polite number, since it can be written in 31 ways as a sum of consecutive naturals, for example, 80839 + ... + 84618.

It is an arithmetic number, because the mean of its divisors is an integer number (14891220).

Almost surely, 2^312713730 is an apocalyptic number.

312713730 is a gapful number since it is divisible by the number (30) formed by its first and last digit.

312713730 is an abundant number, since it is smaller than the sum of its proper divisors (640324350).

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

312713730 is a wasteful number, since it uses less digits than its factorization.

312713730 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 165480 (or 165474 counting only the distinct ones).

The product of its (nonzero) digits is 2646, while the sum is 27.

The square root of 312713730 is about 17683.7136936787. The cubic root of 312713730 is about 678.7590762194.

The spelling of 312713730 in words is "three hundred twelve million, seven hundred thirteen thousand, seven hundred thirty".