631256938 has 8 divisors (see below), whose sum is σ = 1019722788. Its totient is φ = 291349344.

The previous prime is 631256917. The next prime is 631256947. The reversal of 631256938 is 839652136.

It can be written as a sum of positive squares in 2 ways, for example, as 631165129 + 91809 = 25123^2 + 303^2 .

It is a sphenic number, since it is the product of 3 distinct primes.

It is a junction number, because it is equal to n+sod(n) for n = 631256894 and 631256903.

It is an unprimeable number.

It is a polite number, since it can be written in 3 ways as a sum of consecutive naturals, for example, 12139531 + ... + 12139582.

Almost surely, 2^631256938 is an apocalyptic number.

631256938 is a deficient number, since it is larger than the sum of its proper divisors (388465850).

631256938 is a wasteful number, since it uses less digits than its factorization.

631256938 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 24279128.

The product of its digits is 233280, while the sum is 43.

The square root of 631256938 is about 25124.8271237834. The cubic root of 631256938 is about 857.8316285658.

The spelling of 631256938 in words is "six hundred thirty-one million, two hundred fifty-six thousand, nine hundred thirty-eight".