631632 has 20 divisors (see below), whose sum is σ = 1631840. Its totient is φ = 210528.

The previous prime is 631619. The next prime is 631643. The reversal of 631632 is 236136.

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

It is a junction number, because it is equal to n+sod(n) for n = 631599 and 631608.

It is a congruent number.

It is an unprimeable number.

It is a polite number, since it can be written in 3 ways as a sum of consecutive naturals, for example, 6532 + ... + 6627.

It is an arithmetic number, because the mean of its divisors is an integer number (81592).

2⁶³¹⁶³² is an apocalyptic number.

It is an amenable number.

631632 is an abundant number, since it is smaller than the sum of its proper divisors (1000208).

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

631632 is a wasteful number, since it uses less digits than its factorization.

631632 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 13170 (or 13164 counting only the distinct ones).

The product of its digits is 648, while the sum is 21.

The square root of 631632 is about 794.7527917535. The cubic root of 631632 is about 85.8001488796.

Adding to 631632 its reverse (236136), we get a palindrome (867768).

The spelling of 631632 in words is "six hundred thirty-one thousand, six hundred thirty-two".