631080820 has 24 divisors (see below), whose sum is σ = 1395021600. Its totient is φ = 239146272.

The previous prime is 631080799. The next prime is 631080823. The reversal of 631080820 is 28080136.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (631080823) by changing a digit.

It is a polite number, since it can be written in 7 ways as a sum of consecutive naturals, for example, 829990 + ... + 830749.

It is an arithmetic number, because the mean of its divisors is an integer number (58125900).

Almost surely, 2^631080820 is an apocalyptic number.

It is an amenable number.

631080820 is an abundant number, since it is smaller than the sum of its proper divisors (763940780).

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

631080820 is a wasteful number, since it uses less digits than its factorization.

631080820 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 1660767 (or 1660765 counting only the distinct ones).

The product of its (nonzero) digits is 2304, while the sum is 28.

The square root of 631080820 is about 25121.3220193524. The cubic root of 631080820 is about 857.7518440206.

The spelling of 631080820 in words is "six hundred thirty-one million, eighty thousand, eight hundred twenty".