631880 has 16 divisors (see below), whose sum is σ = 1421820. Its totient is φ = 252736.

The previous prime is 631867. The next prime is 631889. The reversal of 631880 is 88136.

It can be written as a sum of positive squares in 2 ways, for example, as 630436 + 1444 = 794^2 + 38^2 .

It is not an unprimeable number, because it can be changed into a prime (631889) by changing a digit.

631880 is an untouchable number, because it is not equal to the sum of proper divisors of any number.

It is a pernicious number, because its binary representation contains a prime number (7) of ones.

It is a polite number, since it can be written in 3 ways as a sum of consecutive naturals, for example, 7859 + ... + 7938.

2⁶³¹⁸⁸⁰ is an apocalyptic number.

It is an amenable number.

631880 is an abundant number, since it is smaller than the sum of its proper divisors (789940).

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

631880 is a wasteful number, since it uses less digits than its factorization.

631880 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 15808 (or 15804 counting only the distinct ones).

The product of its (nonzero) digits is 1152, while the sum is 26.

The square root of 631880 is about 794.9087998003. The cubic root of 631880 is about 85.8113767531.

The spelling of 631880 in words is "six hundred thirty-one thousand, eight hundred eighty".