631396140 has 48 divisors (see below), whose sum is σ = 1772010240. Its totient is φ = 167981760.

The previous prime is 631396109. The next prime is 631396169. The reversal of 631396140 is 41693136.

It is a super-2 number, since 2×631396140² = 797322171213799200, which contains 22 as substring.

It is an unprimeable number.

It is a polite number, since it can be written in 15 ways as a sum of consecutive naturals, for example, 14355 + ... + 38325.

It is an arithmetic number, because the mean of its divisors is an integer number (36916880).

Almost surely, 2^631396140 is an apocalyptic number.

631396140 is a gapful number since it is divisible by the number (60) formed by its first and last digit.

It is an amenable number.

631396140 is an abundant number, since it is smaller than the sum of its proper divisors (1140614100).

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

631396140 is a wasteful number, since it uses less digits than its factorization.

631396140 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 24422 (or 24420 counting only the distinct ones).

The product of its (nonzero) digits is 11664, while the sum is 33.

The square root of 631396140 is about 25127.5971791972. The cubic root of 631396140 is about 857.8946790158.

The spelling of 631396140 in words is "six hundred thirty-one million, three hundred ninety-six thousand, one hundred forty".