312328891 has 24 divisors (see below), whose sum is σ = 380588544. Its totient is φ = 255079440.

The previous prime is 312328847. The next prime is 312328921. The reversal of 312328891 is 198823213.

It is not a de Polignac number, because 312328891 - 2⁷ = 312328763 is a prime.

It is a self number, because there is not a number n which added to its sum of digits gives 312328891.

It is not an unprimeable number, because it can be changed into a prime (312322891) by changing a digit.

It is a polite number, since it can be written in 23 ways as a sum of consecutive naturals, for example, 485416 + ... + 486058.

It is an arithmetic number, because the mean of its divisors is an integer number (15857856).

Almost surely, 2^312328891 is an apocalyptic number.

312328891 is a deficient number, since it is larger than the sum of its proper divisors (68259653).

312328891 is a wasteful number, since it uses less digits than its factorization.

312328891 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 1111 (or 1104 counting only the distinct ones).

The product of its digits is 20736, while the sum is 37.

The square root of 312328891 is about 17672.8291736213. The cubic root of 312328891 is about 678.4805251937.

The spelling of 312328891 in words is "three hundred twelve million, three hundred twenty-eight thousand, eight hundred ninety-one".