631831872 has 168 divisors, whose sum is σ = 1959742080. Its totient is φ = 179128320.

The previous prime is 631831841. The next prime is 631831883. The reversal of 631831872 is 278138136.

It is a tau number, because it is divible by the number of its divisors (168).

It is a nude number because it is divisible by every one of its digits.

It is a self number, because there is not a number n which added to its sum of digits gives 631831872.

It is a congruent number.

It is an unprimeable number.

It is a polite number, since it can be written in 23 ways as a sum of consecutive naturals, for example, 2248372 + ... + 2248652.

Almost surely, 2^631831872 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 631831872, and also a Zumkeller number, because its divisors can be partitioned in two sets with the same sum (979871040).

631831872 is an abundant number, since it is smaller than the sum of its proper divisors (1327910208).

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

631831872 is a wasteful number, since it uses less digits than its factorization.

631831872 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 549 (or 532 counting only the distinct ones).

The product of its digits is 48384, while the sum is 39.

The square root of 631831872 is about 25136.2660711570. The cubic root of 631831872 is about 858.0919805107.

The spelling of 631831872 in words is "six hundred thirty-one million, eight hundred thirty-one thousand, eight hundred seventy-two".