312128 has 14 divisors (see below), whose sum is σ = 619506. Its totient is φ = 156032.

The previous prime is 312121. The next prime is 312161. The reversal of 312128 is 821213.

It can be written as a sum of positive squares in only one way, i.e., 238144 + 73984 = 488^2 + 272^2 .

It is a congruent number.

It is an inconsummate number, since it does not exist a number n which divided by its sum of digits gives 312128.

It is not an unprimeable number, because it can be changed into a prime (312121) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 2375 + ... + 2502.

2³¹²¹²⁸ is an apocalyptic number.

It is an amenable number.

312128 is a deficient number, since it is larger than the sum of its proper divisors (307378).

312128 is an equidigital number, since it uses as much as digits as its factorization.

312128 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 4889 (or 4879 counting only the distinct ones).

The product of its digits is 96, while the sum is 17.

The square root of 312128 is about 558.6841683814. The cubic root of 312128 is about 67.8335027004.

The spelling of 312128 in words is "three hundred twelve thousand, one hundred twenty-eight".