631608 has 16 divisors (see below), whose sum is σ = 1579080. Its totient is φ = 210528.

The previous prime is 631597. The next prime is 631613. The reversal of 631608 is 806136.

It is a hoax number, since the sum of its digits (24) coincides with the sum of the digits of its distinct prime factors.

It is a Harshad number since it is a multiple of its sum of digits (24), and also a Moran number because the ratio is a prime number: 26317 = 631608 / (6 + 3 + 1 + 6 + 0 + 8).

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, 13135 + ... + 13182.

2⁶³¹⁶⁰⁸ is an apocalyptic number.

It is an amenable number.

631608 is an abundant number, since it is smaller than the sum of its proper divisors (947472).

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

631608 is a wasteful number, since it uses less digits than its factorization.

631608 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 26326 (or 26322 counting only the distinct ones).

The product of its (nonzero) digits is 864, while the sum is 24.

The square root of 631608 is about 794.7376925754. The cubic root of 631608 is about 85.7990621552.

The spelling of 631608 in words is "six hundred thirty-one thousand, six hundred eight".