631039680 has 112 divisors (see below), whose sum is σ = 2226198240. Its totient is φ = 168274944.

The previous prime is 631039657. The next prime is 631039687. The reversal of 631039680 is 86930136.

It is a happy number.

It is a super-2 number, since 2×631039680² = 796422155469004800, which contains 22 as substring.

It is a Harshad number since it is a multiple of its sum of digits (36).

It is not an unprimeable number, because it can be changed into a prime (631039687) by changing a digit.

It is a polite number, since it can be written in 15 ways as a sum of consecutive naturals, for example, 27879 + ... + 45158.

It is an arithmetic number, because the mean of its divisors is an integer number (19876770).

Almost surely, 2^631039680 is an apocalyptic number.

631039680 is a gapful number since it is divisible by the number (60) formed by its first and last digit.

It is an amenable number.

631039680 is an abundant number, since it is smaller than the sum of its proper divisors (1595158560).

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

631039680 is a wasteful number, since it uses less digits than its factorization.

631039680 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 73063 (or 73047 counting only the distinct ones).

The product of its (nonzero) digits is 23328, while the sum is 36.

The square root of 631039680 is about 25120.5031796738. The cubic root of 631039680 is about 857.7332047399.

The spelling of 631039680 in words is "six hundred thirty-one million, thirty-nine thousand, six hundred eighty".