631337868 has 96 divisors (see below), whose sum is σ = 1914232320. Its totient is φ = 176178240.

The previous prime is 631337849. The next prime is 631337897. The reversal of 631337868 is 868733136.

631337868 is a `hidden beast` number, since 631 + 3 + 3 + 7 + 8 + 6 + 8 = 666.

It is an unprimeable number.

It is a polite number, since it can be written in 31 ways as a sum of consecutive naturals, for example, 22798 + ... + 42218.

It is an arithmetic number, because the mean of its divisors is an integer number (19939920).

Almost surely, 2^631337868 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 631337868, and also a Zumkeller number, because its divisors can be partitioned in two sets with the same sum (957116160).

631337868 is an abundant number, since it is smaller than the sum of its proper divisors (1282894452).

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

631337868 is a wasteful number, since it uses less digits than its factorization.

631337868 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 19484 (or 19476 counting only the distinct ones).

The product of its digits is 435456, while the sum is 45.

The square root of 631337868 is about 25126.4376305118. The cubic root of 631337868 is about 857.8682863000.

The spelling of 631337868 in words is "six hundred thirty-one million, three hundred thirty-seven thousand, eight hundred sixty-eight".