31890468 has 24 divisors (see below), whose sum is σ = 74889472. Its totient is φ = 10561824.

The previous prime is 31890407. The next prime is 31890473. The reversal of 31890468 is 86409813.

It is an unprimeable number.

It is a polite number, since it can be written in 7 ways as a sum of consecutive naturals, for example, 6580 + ... + 10347.

Almost surely, 2^31890468 is an apocalyptic number.

It is an amenable number.

31890468 is an abundant number, since it is smaller than the sum of its proper divisors (42999004).

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

31890468 is a wasteful number, since it uses less digits than its factorization.

With its predecessor (31890467) it forms a Ruth-Aaron pair, since the sum of their distinct prime factors is the same (17089).

31890468 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 17091 (or 17089 counting only the distinct ones).

The product of its (nonzero) digits is 41472, while the sum is 39.

The square root of 31890468 is about 5647.1645982741. The cubic root of 31890468 is about 317.1175646229.

The spelling of 31890468 in words is "thirty-one million, eight hundred ninety thousand, four hundred sixty-eight".