31490292 has 12 divisors (see below), whose sum is σ = 73477376. Its totient is φ = 10496760.

The previous prime is 31490287. The next prime is 31490297. The reversal of 31490292 is 29209413.

It is an interprime number because it is at equal distance from previous prime (31490287) and next prime (31490297).

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

It is a hoax number, since the sum of its digits (30) coincides with the sum of the digits of its distinct prime factors.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (31490297) 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, 1312084 + ... + 1312107.

Almost surely, 2^31490292 is an apocalyptic number.

It is an amenable number.

31490292 is an abundant number, since it is smaller than the sum of its proper divisors (41987084).

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

31490292 is a wasteful number, since it uses less digits than its factorization.

31490292 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 2624198 (or 2624196 counting only the distinct ones).

The product of its (nonzero) digits is 3888, while the sum is 30.

The square root of 31490292 is about 5611.6211561366. The cubic root of 31490292 is about 315.7855325181.

The spelling of 31490292 in words is "thirty-one million, four hundred ninety thousand, two hundred ninety-two".