630331686 has 32 divisors (see below), whose sum is σ = 1410156000. Its totient is φ = 208697760.

The previous prime is 630331651. The next prime is 630331687. The reversal of 630331686 is 686133036.

630331686 is a `hidden beast` number, since 630 + 3 + 3 + 16 + 8 + 6 = 666.

It is a self number, because there is not a number n which added to its sum of digits gives 630331686.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (630331687) by changing a digit.

It is a polite number, since it can be written in 15 ways as a sum of consecutive naturals, for example, 31125 + ... + 47216.

It is an arithmetic number, because the mean of its divisors is an integer number (44067375).

Almost surely, 2^630331686 is an apocalyptic number.

630331686 is an abundant number, since it is smaller than the sum of its proper divisors (779824314).

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

630331686 is a wasteful number, since it uses less digits than its factorization.

630331686 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 78501 (or 78495 counting only the distinct ones).

The product of its (nonzero) digits is 46656, while the sum is 36.

The square root of 630331686 is about 25106.4072698584. The cubic root of 630331686 is about 857.4123072158.

The spelling of 630331686 in words is "six hundred thirty million, three hundred thirty-one thousand, six hundred eighty-six".