31146872 has 8 divisors (see below), whose sum is σ = 58400400. Its totient is φ = 15573432.

The previous prime is 31146851. The next prime is 31146889. The reversal of 31146872 is 27864113.

It is a tau number, because it is divible by the number of its divisors (8).

It is a congruent number.

It is an unprimeable number.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 1946672 + ... + 1946687.

It is an arithmetic number, because the mean of its divisors is an integer number (7300050).

Almost surely, 2^31146872 is an apocalyptic number.

It is an amenable number.

31146872 is a deficient number, since it is larger than the sum of its proper divisors (27253528).

31146872 is a wasteful number, since it uses less digits than its factorization.

31146872 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 3893365 (or 3893361 counting only the distinct ones).

The product of its digits is 8064, while the sum is 32.

The square root of 31146872 is about 5580.9382723696. The cubic root of 31146872 is about 314.6333922570.

The spelling of 31146872 in words is "thirty-one million, one hundred forty-six thousand, eight hundred seventy-two".