631998672 has 80 divisors (see below), whose sum is σ = 1744412160. Its totient is φ = 196580736.

The previous prime is 631998671. The next prime is 631998683. The reversal of 631998672 is 276899136.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (631998671) 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, 55933 + ... + 66275.

It is an arithmetic number, because the mean of its divisors is an integer number (21805152).

Almost surely, 2^631998672 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 631998672, and also a Zumkeller number, because its divisors can be partitioned in two sets with the same sum (872206080).

631998672 is an abundant number, since it is smaller than the sum of its proper divisors (1112413488).

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

631998672 is a wasteful number, since it uses less digits than its factorization.

631998672 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 10440 (or 10434 counting only the distinct ones).

The product of its digits is 979776, while the sum is 51.

The square root of 631998672 is about 25139.5837674374. The cubic root of 631998672 is about 858.1674843251.

The spelling of 631998672 in words is "six hundred thirty-one million, nine hundred ninety-eight thousand, six hundred seventy-two".