631267940 has 24 divisors (see below), whose sum is σ = 1371376440. Its totient is φ = 243799808.

The previous prime is 631267937. The next prime is 631267957. The reversal of 631267940 is 49762136.

It can be written as a sum of positive squares in 4 ways, for example, as 101163364 + 530104576 = 10058^2 + 23024^2 .

It is a junction number, because it is equal to n+sod(n) for n = 631267894 and 631267903.

It is an unprimeable number.

It is a pernicious number, because its binary representation contains a prime number (11) of ones.

It is a polite number, since it can be written in 7 ways as a sum of consecutive naturals, for example, 543617 + ... + 544776.

It is an arithmetic number, because the mean of its divisors is an integer number (57140685).

Almost surely, 2^631267940 is an apocalyptic number.

It is an amenable number.

631267940 is an abundant number, since it is smaller than the sum of its proper divisors (740108500).

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

631267940 is a wasteful number, since it uses less digits than its factorization.

631267940 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 1088431 (or 1088429 counting only the distinct ones).

The product of its (nonzero) digits is 54432, while the sum is 38.

The square root of 631267940 is about 25125.0460696095. The cubic root of 631267940 is about 857.8366121724.

The spelling of 631267940 in words is "six hundred thirty-one million, two hundred sixty-seven thousand, nine hundred forty".