631690220 has 24 divisors (see below), whose sum is σ = 1516056864. Its totient is φ = 216579456.

The previous prime is 631690219. The next prime is 631690223. The reversal of 631690220 is 22096136.

It is not an unprimeable number, because it can be changed into a prime (631690223) by changing a digit.

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 7 ways as a sum of consecutive naturals, for example, 2255897 + ... + 2256176.

It is an arithmetic number, because the mean of its divisors is an integer number (63169036).

Almost surely, 2^631690220 is an apocalyptic number.

It is an amenable number.

631690220 is an abundant number, since it is smaller than the sum of its proper divisors (884366644).

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

631690220 is a wasteful number, since it uses less digits than its factorization.

631690220 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 4512089 (or 4512087 counting only the distinct ones).

The product of its (nonzero) digits is 3888, while the sum is 29.

The square root of 631690220 is about 25133.4482313908. The cubic root of 631690220 is about 858.0278497742.

The spelling of 631690220 in words is "six hundred thirty-one million, six hundred ninety thousand, two hundred twenty".