631944 has 48 divisors (see below), whose sum is σ = 1750320. Its totient is φ = 205920.

The previous prime is 631937. The next prime is 631979. The reversal of 631944 is 449136.

It is a nude number because it is divisible by every one of its digits.

It is an inconsummate number, since it does not exist a number n which divided by its sum of digits gives 631944.

It is an unprimeable number.

631944 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 11 ways as a sum of consecutive naturals, for example, 4759 + ... + 4889.

It is an arithmetic number, because the mean of its divisors is an integer number (36465).

2⁶³¹⁹⁴⁴ is an apocalyptic number.

It is an amenable number.

It is a practical number, because each smaller number is the sum of distinct divisors of 631944, and also a Zumkeller number, because its divisors can be partitioned in two sets with the same sum (875160).

631944 is an abundant number, since it is smaller than the sum of its proper divisors (1118376).

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

631944 is a wasteful number, since it uses less digits than its factorization.

631944 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 210 (or 203 counting only the distinct ones).

The product of its digits is 2592, while the sum is 27.

The square root of 631944 is about 794.9490549714. The cubic root of 631944 is about 85.8142737920.

The spelling of 631944 in words is "six hundred thirty-one thousand, nine hundred forty-four".