631190638 has 8 divisors (see below), whose sum is σ = 1019615688. Its totient is φ = 291318744.

The previous prime is 631190629. The next prime is 631190657. The reversal of 631190638 is 836091136.

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 = 631190597 and 631190606.

It is a congruent number.

It is an unprimeable number.

It is a pernicious number, because its binary representation contains a prime number (17) of ones.

It is a polite number, since it can be written in 3 ways as a sum of consecutive naturals, for example, 12138256 + ... + 12138307.

It is an arithmetic number, because the mean of its divisors is an integer number (127451961).

Almost surely, 2^631190638 is an apocalyptic number.

631190638 is a deficient number, since it is larger than the sum of its proper divisors (388425050).

631190638 is a wasteful number, since it uses less digits than its factorization.

631190638 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 24276578.

The product of its (nonzero) digits is 23328, while the sum is 37.

The square root of 631190638 is about 25123.5076770741. The cubic root of 631190638 is about 857.8015952441.

The spelling of 631190638 in words is "six hundred thirty-one million, one hundred ninety thousand, six hundred thirty-eight".