631256304 has 160 divisors (see below), whose sum is σ = 1995189760. Its totient is φ = 167961600.

The previous prime is 631256303. The next prime is 631256357. The reversal of 631256304 is 403652136.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (631256303) by changing a digit.

It is a polite number, since it can be written in 31 ways as a sum of consecutive naturals, for example, 388614 + ... + 390234.

It is an arithmetic number, because the mean of its divisors is an integer number (12469936).

Almost surely, 2^631256304 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 631256304, and also a Zumkeller number, because its divisors can be partitioned in two sets with the same sum (997594880).

631256304 is an abundant number, since it is smaller than the sum of its proper divisors (1363933456).

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

631256304 is a wasteful number, since it uses less digits than its factorization.

631256304 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 1719 (or 1713 counting only the distinct ones).

The product of its (nonzero) digits is 12960, while the sum is 30.

The square root of 631256304 is about 25124.8145067780. The cubic root of 631256304 is about 857.8313413793.

The spelling of 631256304 in words is "six hundred thirty-one million, two hundred fifty-six thousand, three hundred four".