31673868 has 12 divisors (see below), whose sum is σ = 73905720. Its totient is φ = 10557952.

The previous prime is 31673861. The next prime is 31673869. The reversal of 31673868 is 86837613.

It is a tau number, because it is divible by the number of its divisors (12).

It is not an unprimeable number, because it can be changed into a prime (31673861) by changing a digit.

It is a polite number, since it can be written in 3 ways as a sum of consecutive naturals, for example, 1319733 + ... + 1319756.

It is an arithmetic number, because the mean of its divisors is an integer number (6158810).

Almost surely, 2^31673868 is an apocalyptic number.

It is an amenable number.

31673868 is an abundant number, since it is smaller than the sum of its proper divisors (42231852).

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

31673868 is a wasteful number, since it uses less digits than its factorization.

31673868 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 2639496 (or 2639494 counting only the distinct ones).

The product of its digits is 145152, while the sum is 42.

The square root of 31673868 is about 5627.9541575958. The cubic root of 31673868 is about 316.3979790424.

The spelling of 31673868 in words is "thirty-one million, six hundred seventy-three thousand, eight hundred sixty-eight".