631982988 has 288 divisors, whose sum is σ = 2087321600. Its totient is φ = 160030080.

The previous prime is 631982987. The next prime is 631983031. The reversal of 631982988 is 889289136.

It is a happy number.

631982988 is digitally balanced in base 2, because in such base it contains all the possibile digits an equal number of times.

It is not an unprimeable number, because it can be changed into a prime (631982987) by changing a digit.

It is a polite number, since it can be written in 95 ways as a sum of consecutive naturals, for example, 4976181 + ... + 4976307.

Almost surely, 2^631982988 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 631982988, and also a Zumkeller number, because its divisors can be partitioned in two sets with the same sum (1043660800).

631982988 is an abundant number, since it is smaller than the sum of its proper divisors (1455338612).

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

631982988 is a wasteful number, since it uses less digits than its factorization.

631982988 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 202 (or 183 counting only the distinct ones).

The product of its digits is 1492992, while the sum is 54.

The square root of 631982988 is about 25139.2718271632. The cubic root of 631982988 is about 858.1603853596.

The spelling of 631982988 in words is "six hundred thirty-one million, nine hundred eighty-two thousand, nine hundred eighty-eight".