631166628 has 48 divisors (see below), whose sum is σ = 1513399104. Its totient is φ = 204610560.

The previous prime is 631166623. The next prime is 631166639. The reversal of 631166628 is 826661136.

It is not an unprimeable number, because it can be changed into a prime (631166623) by changing a digit.

It is a polite number, since it can be written in 15 ways as a sum of consecutive naturals, for example, 168876 + ... + 172572.

It is an arithmetic number, because the mean of its divisors is an integer number (31529148).

Almost surely, 2^631166628 is an apocalyptic number.

It is an amenable number.

631166628 is an abundant number, since it is smaller than the sum of its proper divisors (882232476).

It is a pseudoperfect number, because it is the sum of a subset of its proper divisors.

631166628 is a wasteful number, since it uses less digits than its factorization.

631166628 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 4092 (or 4090 counting only the distinct ones).

The product of its digits is 62208, while the sum is 39.

The square root of 631166628 is about 25123.0298332028. The cubic root of 631166628 is about 857.7907184047.

The spelling of 631166628 in words is "six hundred thirty-one million, one hundred sixty-six thousand, six hundred twenty-eight".