631573872 has 20 divisors (see below), whose sum is σ = 1631565960. Its totient is φ = 210524608.

The previous prime is 631573867. The next prime is 631573879. The reversal of 631573872 is 278375136.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (631573879) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (13) of ones.

It is a polite number, since it can be written in 3 ways as a sum of consecutive naturals, for example, 6578847 + ... + 6578942.

It is an arithmetic number, because the mean of its divisors is an integer number (81578298).

Almost surely, 2^631573872 is an apocalyptic number.

It is an amenable number.

631573872 is an abundant number, since it is smaller than the sum of its proper divisors (999992088).

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

631573872 is a wasteful number, since it uses less digits than its factorization.

631573872 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 13157800 (or 13157794 counting only the distinct ones).

The product of its digits is 211680, while the sum is 42.

The square root of 631573872 is about 25131.1335199987. The cubic root of 631573872 is about 857.9751678579.

The spelling of 631573872 in words is "six hundred thirty-one million, five hundred seventy-three thousand, eight hundred seventy-two".