31945842 has 12 divisors (see below), whose sum is σ = 69216030. Its totient is φ = 10648608.

The previous prime is 31945831. The next prime is 31945867. The reversal of 31945842 is 24854913.

It can be written as a sum of positive squares in only one way, i.e., 26842761 + 5103081 = 5181^2 + 2259^2 .

It is a junction number, because it is equal to n+sod(n) for n = 31945797 and 31945806.

It is an unprimeable number.

It is a polite number, since it can be written in 5 ways as a sum of consecutive naturals, for example, 887367 + ... + 887402.

Almost surely, 2^31945842 is an apocalyptic number.

31945842 is an abundant number, since it is smaller than the sum of its proper divisors (37270188).

It is a pseudoperfect number, because it is the sum of a subset of its proper divisors.

31945842 is a wasteful number, since it uses less digits than its factorization.

31945842 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 1774777 (or 1774774 counting only the distinct ones).

The product of its digits is 34560, while the sum is 36.

The square root of 31945842 is about 5652.0652862471. The cubic root of 31945842 is about 317.3010041193.

The spelling of 31945842 in words is "thirty-one million, nine hundred forty-five thousand, eight hundred forty-two".