631920870 has 48 divisors (see below), whose sum is σ = 1877709600. Its totient is φ = 144438912.

The previous prime is 631920859. The next prime is 631920881. The reversal of 631920870 is 78029136.

631920870 is digitally balanced in base 2, because in such base it contains all the possibile digits an equal number of times.

It is an interprime number because it is at equal distance from previous prime (631920859) and next prime (631920881).

It is a congruent number.

It is an unprimeable number.

It is a polite number, since it can be written in 23 ways as a sum of consecutive naturals, for example, 500895 + ... + 502154.

It is an arithmetic number, because the mean of its divisors is an integer number (39118950).

Almost surely, 2^631920870 is an apocalyptic number.

631920870 is an abundant number, since it is smaller than the sum of its proper divisors (1245788730).

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

631920870 is a wasteful number, since it uses less digits than its factorization.

631920870 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 1003069 (or 1003066 counting only the distinct ones).

The product of its (nonzero) digits is 18144, while the sum is 36.

The square root of 631920870 is about 25138.0363194900. The cubic root of 631920870 is about 858.1322680662.

The spelling of 631920870 in words is "six hundred thirty-one million, nine hundred twenty thousand, eight hundred seventy".