631377020 has 12 divisors (see below), whose sum is σ = 1325891784. Its totient is φ = 252550800.

The previous prime is 631377017. The next prime is 631377029. The reversal of 631377020 is 20773136.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (631377029) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (13) of ones.

It is a polite number, since it can be written in 3 ways as a sum of consecutive naturals, for example, 15784406 + ... + 15784445.

It is an arithmetic number, because the mean of its divisors is an integer number (110490982).

Almost surely, 2^631377020 is an apocalyptic number.

It is an amenable number.

631377020 is an abundant number, since it is smaller than the sum of its proper divisors (694514764).

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

631377020 is a wasteful number, since it uses less digits than its factorization.

631377020 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 31568860 (or 31568858 counting only the distinct ones).

The product of its (nonzero) digits is 5292, while the sum is 29.

The square root of 631377020 is about 25127.2167181326. The cubic root of 631377020 is about 857.8860193114.

The spelling of 631377020 in words is "six hundred thirty-one million, three hundred seventy-seven thousand, twenty".