31872426 has 8 divisors (see below), whose sum is σ = 63744864. Its totient is φ = 10624140.

The previous prime is 31872419. The next prime is 31872427. The reversal of 31872426 is 62427813.

It is a sphenic number, since it is the product of 3 distinct primes.

31872426 is an admirable number.

It is not an unprimeable number, because it can be changed into a prime (31872427) 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, 2656030 + ... + 2656041.

It is an arithmetic number, because the mean of its divisors is an integer number (7968108).

Almost surely, 2^31872426 is an apocalyptic number.

31872426 is a primitive abundant number, since it is smaller than the sum of its proper divisors, none of which is abundant.

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

31872426 is a wasteful number, since it uses less digits than its factorization.

31872426 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 5312076.

The product of its digits is 16128, while the sum is 33.

The square root of 31872426 is about 5645.5669334443. The cubic root of 31872426 is about 317.0577503611.

The spelling of 31872426 in words is "thirty-one million, eight hundred seventy-two thousand, four hundred twenty-six".