31042328 has 32 divisors (see below), whose sum is σ = 59505600. Its totient is φ = 15178752.

The previous prime is 31042327. The next prime is 31042337. The reversal of 31042328 is 82324013.

It is a super-2 number, since 2×31042328² = 1927252255319168, which contains 22 as substring.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (31042327) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (13) of ones.

It is a polite number, since it can be written in 7 ways as a sum of consecutive naturals, for example, 84401 + ... + 84767.

It is an arithmetic number, because the mean of its divisors is an integer number (1859550).

Almost surely, 2^31042328 is an apocalyptic number.

It is an amenable number.

31042328 is a deficient number, since it is larger than the sum of its proper divisors (28463272).

31042328 is a wasteful number, since it uses less digits than its factorization.

31042328 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 579 (or 575 counting only the distinct ones).

The product of its (nonzero) digits is 1152, while the sum is 23.

The square root of 31042328 is about 5571.5642327806. The cubic root of 31042328 is about 314.2809769455.

The spelling of 31042328 in words is "thirty-one million, forty-two thousand, three hundred twenty-eight".