631604020 has 48 divisors (see below), whose sum is σ = 1345720320. Its totient is φ = 248984064.

The previous prime is 631604011. The next prime is 631604033. The reversal of 631604020 is 20406136.

It is a junction number, because it is equal to n+sod(n) for n = 631603982 and 631604000.

It is a congruent number.

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, 423436 + ... + 424924.

It is an arithmetic number, because the mean of its divisors is an integer number (28035840).

Almost surely, 2^631604020 is an apocalyptic number.

It is an amenable number.

631604020 is an abundant number, since it is smaller than the sum of its proper divisors (714116300).

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

631604020 is a wasteful number, since it uses less digits than its factorization.

631604020 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 1792 (or 1790 counting only the distinct ones).

The product of its (nonzero) digits is 864, while the sum is 22.

The square root of 631604020 is about 25131.7333266132. The cubic root of 631604020 is about 857.9888193746.

The spelling of 631604020 in words is "six hundred thirty-one million, six hundred four thousand, twenty".