631624 has 16 divisors (see below), whose sum is σ = 1353600. Its totient is φ = 270672.

The previous prime is 631619. The next prime is 631643. The reversal of 631624 is 426136.

It is a junction number, because it is equal to n+sod(n) for n = 631595 and 631604.

It is an unprimeable number.

631624 is an untouchable number, because it is not equal to the sum of proper divisors of any number.

It is a polite number, since it can be written in 3 ways as a sum of consecutive naturals, for example, 5584 + ... + 5695.

It is an arithmetic number, because the mean of its divisors is an integer number (84600).

2⁶³¹⁶²⁴ is an apocalyptic number.

It is an amenable number.

631624 is an abundant number, since it is smaller than the sum of its proper divisors (721976).

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

631624 is a wasteful number, since it uses less digits than its factorization.

631624 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 11292 (or 11288 counting only the distinct ones).

The product of its digits is 864, while the sum is 22.

The square root of 631624 is about 794.7477587260. The cubic root of 631624 is about 85.7997866412.

The spelling of 631624 in words is "six hundred thirty-one thousand, six hundred twenty-four".