631863860 has 12 divisors (see below), whose sum is σ = 1326914148. Its totient is φ = 252745536.

The previous prime is 631863857. The next prime is 631863893. The reversal of 631863860 is 68368136.

631863860 is digitally balanced in base 2, because in such base it contains all the possibile digits an equal number of times.

It can be written as a sum of positive squares in 2 ways, for example, as 192709924 + 439153936 = 13882^2 + 20956^2 .

It is a hoax number, since the sum of its digits (41) coincides with the sum of the digits of its distinct prime factors.

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, 15796577 + ... + 15796616.

It is an arithmetic number, because the mean of its divisors is an integer number (110576179).

Almost surely, 2^631863860 is an apocalyptic number.

It is an amenable number.

631863860 is an abundant number, since it is smaller than the sum of its proper divisors (695050288).

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

631863860 is a wasteful number, since it uses less digits than its factorization.

631863860 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 31593202 (or 31593200 counting only the distinct ones).

The product of its (nonzero) digits is 124416, while the sum is 41.

The square root of 631863860 is about 25136.9023549044. The cubic root of 631863860 is about 858.1064612528.

The spelling of 631863860 in words is "six hundred thirty-one million, eight hundred sixty-three thousand, eight hundred sixty".