631422668 has 24 divisors (see below), whose sum is σ = 1177881600. Its totient is φ = 295306128.

The previous prime is 631422647. The next prime is 631422677. The reversal of 631422668 is 866224136.

It is a Harshad number since it is a multiple of its sum of digits (38).

It is an unprimeable number.

It is a polite number, since it can be written in 7 ways as a sum of consecutive naturals, for example, 46580 + ... + 58587.

It is an arithmetic number, because the mean of its divisors is an integer number (49078400).

Almost surely, 2^631422668 is an apocalyptic number.

It is an amenable number.

631422668 is a deficient number, since it is larger than the sum of its proper divisors (546458932).

631422668 is a wasteful number, since it uses less digits than its factorization.

631422668 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 105269 (or 105267 counting only the distinct ones).

The product of its digits is 82944, while the sum is 38.

The square root of 631422668 is about 25128.1250394851. The cubic root of 631422668 is about 857.9066936133.

It can be divided in two parts, 6314 and 22668, that added together give a palindrome (28982).

The spelling of 631422668 in words is "six hundred thirty-one million, four hundred twenty-two thousand, six hundred sixty-eight".