312428 has 12 divisors (see below), whose sum is σ = 561792. Its totient is φ = 151920.

The previous prime is 312427. The next prime is 312451. The reversal of 312428 is 824213.

It is a super-2 number, since 2×312428² = 195222510368, which contains 22 as substring.

It is an inconsummate number, since it does not exist a number n which divided by its sum of digits gives 312428.

It is not an unprimeable number, because it can be changed into a prime (312427) by changing a digit.

It is a polite number, since it can be written in 3 ways as a sum of consecutive naturals, for example, 908 + ... + 1203.

It is an arithmetic number, because the mean of its divisors is an integer number (46816).

2³¹²⁴²⁸ is an apocalyptic number.

It is an amenable number.

312428 is a deficient number, since it is larger than the sum of its proper divisors (249364).

312428 is a wasteful number, since it uses less digits than its factorization.

312428 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 2152 (or 2150 counting only the distinct ones).

The product of its digits is 384, while the sum is 20.

The square root of 312428 is about 558.9525919074. The cubic root of 312428 is about 67.8552283327.

The spelling of 312428 in words is "three hundred twelve thousand, four hundred twenty-eight".