631479888 has 200 divisors, whose sum is σ = 2023469448. Its totient is φ = 188863488.

The previous prime is 631479809. The next prime is 631479899. The reversal of 631479888 is 888974136.

It can be written as a sum of positive squares in 4 ways, for example, as 1871424 + 629608464 = 1368^2 + 25092^2 .

It is a Harshad number since it is a multiple of its sum of digits (54).

It is a congruent number.

It is an unprimeable number.

It is a polite number, since it can be written in 39 ways as a sum of consecutive naturals, for example, 622870 + ... + 623882.

Almost surely, 2^631479888 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 631479888, and also a Zumkeller number, because its divisors can be partitioned in two sets with the same sum (1011734724).

631479888 is an abundant number, since it is smaller than the sum of its proper divisors (1391989560).

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

631479888 is a wasteful number, since it uses less digits than its factorization.

631479888 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 1083 (or 1068 counting only the distinct ones).

The product of its digits is 2322432, while the sum is 54.

The square root of 631479888 is about 25129.2635785452. The cubic root of 631479888 is about 857.9326075484.

The spelling of 631479888 in words is "six hundred thirty-one million, four hundred seventy-nine thousand, eight hundred eighty-eight".