631240456 has 64 divisors (see below), whose sum is σ = 1507092480. Its totient is φ = 240694080.

The previous prime is 631240391. The next prime is 631240459. The reversal of 631240456 is 654042136.

It is not an unprimeable number, because it can be changed into a prime (631240459) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (17) of ones.

It is a polite number, since it can be written in 15 ways as a sum of consecutive naturals, for example, 18051 + ... + 39853.

It is an arithmetic number, because the mean of its divisors is an integer number (23548320).

Almost surely, 2^631240456 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 631240456, and also a Zumkeller number, because its divisors can be partitioned in two sets with the same sum (753546240).

631240456 is an abundant number, since it is smaller than the sum of its proper divisors (875852024).

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

631240456 is a wasteful number, since it uses less digits than its factorization.

631240456 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 21874 (or 21870 counting only the distinct ones).

The product of its (nonzero) digits is 17280, while the sum is 31.

The square root of 631240456 is about 25124.4991193854. The cubic root of 631240456 is about 857.8241625600.

The spelling of 631240456 in words is "six hundred thirty-one million, two hundred forty thousand, four hundred fifty-six".