631938 has 8 divisors (see below), whose sum is σ = 1263888. Its totient is φ = 210644.

The previous prime is 631937. The next prime is 631979. The reversal of 631938 is 839136.

It is a sphenic number, since it is the product of 3 distinct primes.

631938 is an admirable number.

It is not an unprimeable number, because it can be changed into a prime (631931) by changing a digit.

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, 52656 + ... + 52667.

It is an arithmetic number, because the mean of its divisors is an integer number (157986).

2⁶³¹⁹³⁸ is an apocalyptic number.

631938 is a primitive abundant number, since it is smaller than the sum of its proper divisors, none of which is abundant.

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

631938 is a wasteful number, since it uses less digits than its factorization.

631938 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 105328.

The product of its digits is 3888, while the sum is 30.

The square root of 631938 is about 794.9452811358. The cubic root of 631938 is about 85.8140022029.

The spelling of 631938 in words is "six hundred thirty-one thousand, nine hundred thirty-eight".