631444680 has 128 divisors (see below), whose sum is σ = 2153923200. Its totient is φ = 164457216.

The previous prime is 631444657. The next prime is 631444717. The reversal of 631444680 is 86444136.

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

It is an unprimeable number.

It is a polite number, since it can be written in 31 ways as a sum of consecutive naturals, for example, 39642 + ... + 53238.

It is an arithmetic number, because the mean of its divisors is an integer number (16827525).

Almost surely, 2^631444680 is an apocalyptic number.

631444680 is a gapful number since it is divisible by the number (60) 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 631444680, and also a Zumkeller number, because its divisors can be partitioned in two sets with the same sum (1076961600).

631444680 is an abundant number, since it is smaller than the sum of its proper divisors (1522478520).

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

631444680 is a wasteful number, since it uses less digits than its factorization.

631444680 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 13660 (or 13650 counting only the distinct ones).

The product of its (nonzero) digits is 55296, while the sum is 36.

The square root of 631444680 is about 25128.5630309415. The cubic root of 631444680 is about 857.9166626476.

The spelling of 631444680 in words is "six hundred thirty-one million, four hundred forty-four thousand, six hundred eighty".