31890325 has 24 divisors (see below), whose sum is σ = 40810880. Its totient is φ = 24710400.

The previous prime is 31890323. The next prime is 31890349. The reversal of 31890325 is 52309813.

It is a happy number.

It is not a de Polignac number, because 31890325 - 2¹ = 31890323 is a prime.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (31890323) by changing a digit.

It is a polite number, since it can be written in 23 ways as a sum of consecutive naturals, for example, 132205 + ... + 132445.

Almost surely, 2^31890325 is an apocalyptic number.

It is an amenable number.

31890325 is a deficient number, since it is larger than the sum of its proper divisors (8920555).

31890325 is a wasteful number, since it uses less digits than its factorization.

31890325 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 397 (or 392 counting only the distinct ones).

The product of its (nonzero) digits is 6480, while the sum is 31.

The square root of 31890325 is about 5647.1519370387. The cubic root of 31890325 is about 317.1170906268.

The spelling of 31890325 in words is "thirty-one million, eight hundred ninety thousand, three hundred twenty-five".