631208 has 8 divisors (see below), whose sum is σ = 1183530. Its totient is φ = 315600.

The previous prime is 631187. The next prime is 631223. The reversal of 631208 is 802136.

It can be written as a sum of positive squares in only one way, i.e., 574564 + 56644 = 758^2 + 238^2 .

It is a tau number, because it is divible by the number of its divisors (8).

It is a self number, because there is not a number n which added to its sum of digits gives 631208.

It is an unprimeable number.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 39443 + ... + 39458.

2⁶³¹²⁰⁸ is an apocalyptic number.

It is an amenable number.

631208 is a deficient number, since it is larger than the sum of its proper divisors (552322).

631208 is a wasteful number, since it uses less digits than its factorization.

631208 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 78907 (or 78903 counting only the distinct ones).

The product of its (nonzero) digits is 288, while the sum is 20.

The square root of 631208 is about 794.4859973593. The cubic root of 631208 is about 85.7809460282.

The spelling of 631208 in words is "six hundred thirty-one thousand, two hundred eight".