631660032 has 120 divisors (see below), whose sum is σ = 1890905016. Its totient is φ = 210511872.

The previous prime is 631660019. The next prime is 631660039. The reversal of 631660032 is 230066136.

It is a Harshad number since it is a multiple of its sum of digits (27).

It is a junction number, because it is equal to n+sod(n) for n = 631659978 and 631660005.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (631660039) by changing a digit.

It is a polite number, since it can be written in 11 ways as a sum of consecutive naturals, for example, 121878 + ... + 126954.

Almost surely, 2^631660032 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 631660032, and also a Zumkeller number, because its divisors can be partitioned in two sets with the same sum (945452508).

631660032 is an abundant number, since it is smaller than the sum of its proper divisors (1259244984).

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

631660032 is an frugal number, since it uses more digits than its factorization.

631660032 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 5110 (or 5082 counting only the distinct ones).

The product of its (nonzero) digits is 3888, while the sum is 27.

The square root of 631660032 is about 25132.8476699319. The cubic root of 631660032 is about 858.0141813882.

The spelling of 631660032 in words is "six hundred thirty-one million, six hundred sixty thousand, thirty-two".