631707380 has 12 divisors (see below), whose sum is σ = 1326585540. Its totient is φ = 252682944.

The previous prime is 631707379. The next prime is 631707407. The reversal of 631707380 is 83707136.

It can be written as a sum of positive squares in 2 ways, for example, as 277289104 + 354418276 = 16652^2 + 18826^2 .

It is a self number, because there is not a number n which added to its sum of digits gives 631707380.

It is a congruent number.

It is an unprimeable number.

It is a polite number, since it can be written in 3 ways as a sum of consecutive naturals, for example, 15792665 + ... + 15792704.

It is an arithmetic number, because the mean of its divisors is an integer number (110548795).

Almost surely, 2^631707380 is an apocalyptic number.

It is an amenable number.

631707380 is an abundant number, since it is smaller than the sum of its proper divisors (694878160).

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

631707380 is a wasteful number, since it uses less digits than its factorization.

631707380 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 31585378 (or 31585376 counting only the distinct ones).

The product of its (nonzero) digits is 21168, while the sum is 35.

The square root of 631707380 is about 25133.7896068221. The cubic root of 631707380 is about 858.0356192072.

The spelling of 631707380 in words is "six hundred thirty-one million, seven hundred seven thousand, three hundred eighty".