31328042 has 16 divisors (see below), whose sum is σ = 51363072. Its totient is φ = 14266560.

The previous prime is 31328039. The next prime is 31328053. The reversal of 31328042 is 24082313.

It is a junction number, because it is equal to n+sod(n) for n = 31327999 and 31328017.

It is an unprimeable number.

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, 13808 + ... + 15915.

It is an arithmetic number, because the mean of its divisors is an integer number (3210192).

Almost surely, 2^31328042 is an apocalyptic number.

31328042 is a deficient number, since it is larger than the sum of its proper divisors (20035030).

31328042 is a wasteful number, since it uses less digits than its factorization.

31328042 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 29773.

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

The square root of 31328042 is about 5597.1458798213. The cubic root of 31328042 is about 315.2422491938.

The spelling of 31328042 in words is "thirty-one million, three hundred twenty-eight thousand, forty-two".