631646832 has 80 divisors (see below), whose sum is σ = 1774520352. Its totient is φ = 192798720.

The previous prime is 631646801. The next prime is 631646839. The reversal of 631646832 is 238646136.

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

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (631646839) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (13) of ones.

It is a polite number, since it can be written in 15 ways as a sum of consecutive naturals, for example, 19732 + ... + 40652.

Almost surely, 2^631646832 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 631646832, and also a Zumkeller number, because its divisors can be partitioned in two sets with the same sum (887260176).

631646832 is an abundant number, since it is smaller than the sum of its proper divisors (1142873520).

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

631646832 is a wasteful number, since it uses less digits than its factorization.

631646832 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 20986 (or 20980 counting only the distinct ones).

The product of its digits is 124416, while the sum is 39.

The square root of 631646832 is about 25132.5850640160. The cubic root of 631646832 is about 858.0082046151.

It can be divided in two parts, 63164 and 6832, that added together give a palindrome (69996).

The spelling of 631646832 in words is "six hundred thirty-one million, six hundred forty-six thousand, eight hundred thirty-two".