631875478 has 8 divisors (see below), whose sum is σ = 1020721968. Its totient is φ = 291634824.

The previous prime is 631875469. The next prime is 631875479. The reversal of 631875478 is 874578136.

It is a happy number.

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

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (631875479) by changing a digit.

It is a polite number, since it can be written in 3 ways as a sum of consecutive naturals, for example, 12151426 + ... + 12151477.

It is an arithmetic number, because the mean of its divisors is an integer number (127590246).

Almost surely, 2^631875478 is an apocalyptic number.

631875478 is a deficient number, since it is larger than the sum of its proper divisors (388846490).

631875478 is a wasteful number, since it uses less digits than its factorization.

631875478 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 24302918.

The product of its digits is 1128960, while the sum is 49.

The square root of 631875478 is about 25137.1334483469. The cubic root of 631875478 is about 858.1117205185. Note that the first 3 decimals are identical.

It can be divided in two parts, 6318 and 75478, that added together give a square (81796 = 286²).

The spelling of 631875478 in words is "six hundred thirty-one million, eight hundred seventy-five thousand, four hundred seventy-eight".