631404936 has 64 divisors (see below), whose sum is σ = 1814400000. Its totient is φ = 203208768.

The previous prime is 631404923. The next prime is 631404989. The reversal of 631404936 is 639404136.

It is a Harshad number since it is a multiple of its sum of digits (36).

It is a self number, because there is not a number n which added to its sum of digits gives 631404936.

It is an unprimeable number.

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, 44136 + ... + 56663.

It is an arithmetic number, because the mean of its divisors is an integer number (28350000).

Almost surely, 2^631404936 is an apocalyptic number.

It is an amenable number.

631404936 is an abundant number, since it is smaller than the sum of its proper divisors (1182995064).

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

631404936 is a wasteful number, since it uses less digits than its factorization.

631404936 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 100843 (or 100833 counting only the distinct ones).

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

The square root of 631404936 is about 25127.7722052712. The cubic root of 631404936 is about 857.8986627835.

The spelling of 631404936 in words is "six hundred thirty-one million, four hundred four thousand, nine hundred thirty-six".