312756738 has 16 divisors (see below), whose sum is σ = 714872640. Its totient is φ = 89359056.

The previous prime is 312756727. The next prime is 312756749. The reversal of 312756738 is 837657213.

312756738 is digitally balanced in base 3, because in such base it contains all the possibile digits an equal number of times.

It is an interprime number because it is at equal distance from previous prime (312756727) and next prime (312756749).

It is a Harshad number since it is a multiple of its sum of digits (42), and also a Moran number because the ratio is a prime number: 7446589 = 312756738 / (3 + 1 + 2 + 7 + 5 + 6 + 7 + 3 + 8).

It is a self number, because there is not a number n which added to its sum of digits gives 312756738.

It is an unprimeable number.

It is a polite number, since it can be written in 7 ways as a sum of consecutive naturals, for example, 3723253 + ... + 3723336.

It is an arithmetic number, because the mean of its divisors is an integer number (44679540).

Almost surely, 2^312756738 is an apocalyptic number.

312756738 is an abundant number, since it is smaller than the sum of its proper divisors (402115902).

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

312756738 is a wasteful number, since it uses less digits than its factorization.

312756738 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 7446601.

The product of its digits is 211680, while the sum is 42.

The square root of 312756738 is about 17684.9296860349. The cubic root of 312756738 is about 678.7901917194.

The spelling of 312756738 in words is "three hundred twelve million, seven hundred fifty-six thousand, seven hundred thirty-eight".