631326256 has 40 divisors (see below), whose sum is σ = 1346677200. Its totient is φ = 284325120.

The previous prime is 631326247. The next prime is 631326329. The reversal of 631326256 is 652623136.

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 7 ways as a sum of consecutive naturals, for example, 2730 + ... + 35638.

It is an arithmetic number, because the mean of its divisors is an integer number (33666930).

Almost surely, 2^631326256 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 631326256, and also a Zumkeller number, because its divisors can be partitioned in two sets with the same sum (673338600).

631326256 is an abundant number, since it is smaller than the sum of its proper divisors (715350944).

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

631326256 is a wasteful number, since it uses less digits than its factorization.

631326256 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 33037 (or 33031 counting only the distinct ones).

The product of its digits is 38880, while the sum is 34.

The square root of 631326256 is about 25126.2065580939. The cubic root of 631326256 is about 857.8630267667.

The spelling of 631326256 in words is "six hundred thirty-one million, three hundred twenty-six thousand, two hundred fifty-six".