631256384 has 56 divisors (see below), whose sum is σ = 1371819456. Its totient is φ = 285824000.

The previous prime is 631256357. The next prime is 631256401. The reversal of 631256384 is 483652136.

It is a congruent number.

It is an unprimeable number.

It is a polite number, since it can be written in 7 ways as a sum of consecutive naturals, for example, 196229 + ... + 199419.

It is an arithmetic number, because the mean of its divisors is an integer number (24496776).

Almost surely, 2^631256384 is an apocalyptic number.

631256384 is a gapful number since it is divisible by the number (64) formed by its first and last digit.

It is an amenable number.

It is a practical number, because each smaller number is the sum of distinct divisors of 631256384, and also a Zumkeller number, because its divisors can be partitioned in two sets with the same sum (685909728).

631256384 is an abundant number, since it is smaller than the sum of its proper divisors (740563072).

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

631256384 is a wasteful number, since it uses less digits than its factorization.

631256384 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 3495 (or 3485 counting only the distinct ones).

The product of its digits is 103680, while the sum is 38.

The square root of 631256384 is about 25124.8160988295. The cubic root of 631256384 is about 857.8313776174.

The spelling of 631256384 in words is "six hundred thirty-one million, two hundred fifty-six thousand, three hundred eighty-four".