31489492 has 12 divisors (see below), whose sum is σ = 55236916. Its totient is φ = 15707520.

The previous prime is 31489489. The next prime is 31489519. The reversal of 31489492 is 29498413.

It can be written as a sum of positive squares in 2 ways, for example, as 17606416 + 13883076 = 4196^2 + 3726^2 .

It is a congruent 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, 7359 + ... + 10822.

Almost surely, 2^31489492 is an apocalyptic number.

It is an amenable number.

31489492 is a deficient number, since it is larger than the sum of its proper divisors (23747424).

31489492 is a wasteful number, since it uses less digits than its factorization.

31489492 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 18618 (or 18616 counting only the distinct ones).

The product of its digits is 62208, while the sum is 40.

The square root of 31489492 is about 5611.5498750345. The cubic root of 31489492 is about 315.7828583546.

The spelling of 31489492 in words is "thirty-one million, four hundred eighty-nine thousand, four hundred ninety-two".