31872260 has 48 divisors (see below), whose sum is σ = 77314944. Its totient is φ = 10810368.

The previous prime is 31872259. The next prime is 31872271. The reversal of 31872260 is 6227813.

It is a happy number.

It is an unprimeable number.

It is a pernicious number, because its binary representation contains a prime number (11) of ones.

It is a polite number, since it can be written in 15 ways as a sum of consecutive naturals, for example, 12407 + ... + 14753.

It is an arithmetic number, because the mean of its divisors is an integer number (1610728).

Almost surely, 2^31872260 is an apocalyptic number.

It is an amenable number.

It is a practical number, because each smaller number is the sum of distinct divisors of 31872260, and also a Zumkeller number, because its divisors can be partitioned in two sets with the same sum (38657472).

31872260 is an abundant number, since it is smaller than the sum of its proper divisors (45442684).

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

31872260 is a wasteful number, since it uses less digits than its factorization.

31872260 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 2460 (or 2458 counting only the distinct ones).

The product of its (nonzero) digits is 4032, while the sum is 29.

The square root of 31872260 is about 5645.5522316245. The cubic root of 31872260 is about 317.0571999201.

The spelling of 31872260 in words is "thirty-one million, eight hundred seventy-two thousand, two hundred sixty".