631768 has 16 divisors (see below), whose sum is σ = 1194480. Its totient is φ = 313248.

The previous prime is 631753. The next prime is 631789. The reversal of 631768 is 867136.

631768 is digitally balanced in base 2, because in such base it contains all the possibile digits an equal number of times.

It is a congruent number.

It is an unprimeable number.

631768 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, 1005 + ... + 1507.

It is an arithmetic number, because the mean of its divisors is an integer number (74655).

2⁶³¹⁷⁶⁸ is an apocalyptic number.

631768 is the 503-rd heptagonal number.

It is an amenable number.

631768 is a deficient number, since it is larger than the sum of its proper divisors (562712).

631768 is a wasteful number, since it uses less digits than its factorization.

631768 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 666 (or 662 counting only the distinct ones).

The product of its digits is 6048, while the sum is 31.

The square root of 631768 is about 794.8383483451. The cubic root of 631768 is about 85.8063064644.

The spelling of 631768 in words is "six hundred thirty-one thousand, seven hundred sixty-eight".