631387478 has 24 divisors (see below), whose sum is σ = 1012589760. Its totient is φ = 294950880.

The previous prime is 631387459. The next prime is 631387481. The reversal of 631387478 is 874783136.

It is a congruent number.

It is an unprimeable number.

It is a polite number, since it can be written in 11 ways as a sum of consecutive naturals, for example, 46088 + ... + 58196.

It is an arithmetic number, because the mean of its divisors is an integer number (42191240).

Almost surely, 2^631387478 is an apocalyptic number.

631387478 is a deficient number, since it is larger than the sum of its proper divisors (381202282).

631387478 is a wasteful number, since it uses less digits than its factorization.

631387478 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 12200 (or 12171 counting only the distinct ones).

The product of its digits is 677376, while the sum is 47.

The square root of 631387478 is about 25127.4248183136. The cubic root of 631387478 is about 857.8907559015.

The spelling of 631387478 in words is "six hundred thirty-one million, three hundred eighty-seven thousand, four hundred seventy-eight".