31973228 has 12 divisors (see below), whose sum is σ = 63946512. Its totient is φ = 13702800.

The previous prime is 31973203. The next prime is 31973233. The reversal of 31973228 is 82237913.

31973228 is an admirable number.

It is an unprimeable number.

It is a polite number, since it can be written in 3 ways as a sum of consecutive naturals, for example, 570923 + ... + 570978.

It is an arithmetic number, because the mean of its divisors is an integer number (5328876).

Almost surely, 2^31973228 is an apocalyptic number.

It is an amenable number.

31973228 is a primitive abundant number, since it is smaller than the sum of its proper divisors, none of which is abundant.

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

31973228 is a wasteful number, since it uses less digits than its factorization.

31973228 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 1141912 (or 1141910 counting only the distinct ones).

The product of its digits is 18144, while the sum is 35.

The square root of 31973228 is about 5654.4874215087. The cubic root of 31973228 is about 317.3916483976.

The spelling of 31973228 in words is "thirty-one million, nine hundred seventy-three thousand, two hundred twenty-eight".