631253940 has 24 divisors (see below), whose sum is σ = 1767511200. Its totient is φ = 168334368.

The previous prime is 631253879. The next prime is 631253983. The reversal of 631253940 is 49352136.

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 7 ways as a sum of consecutive naturals, for example, 5260390 + ... + 5260509.

It is an arithmetic number, because the mean of its divisors is an integer number (73646300).

Almost surely, 2^631253940 is an apocalyptic number.

631253940 is a gapful number since it is divisible by the number (60) formed by its first and last digit.

It is an amenable number.

631253940 is an abundant number, since it is smaller than the sum of its proper divisors (1136257260).

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

631253940 is a wasteful number, since it uses less digits than its factorization.

631253940 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 10520911 (or 10520909 counting only the distinct ones).

The product of its (nonzero) digits is 19440, while the sum is 33.

The square root of 631253940 is about 25124.7674616105. The cubic root of 631253940 is about 857.8302705434.

The spelling of 631253940 in words is "six hundred thirty-one million, two hundred fifty-three thousand, nine hundred forty".