637968 has 20 divisors (see below), whose sum is σ = 1648208. Its totient is φ = 212640.

The previous prime is 637939. The next prime is 638023. The reversal of 637968 is 869736.

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, 6598 + ... + 6693.

2⁶³⁷⁹⁶⁸ is an apocalyptic number.

It is an amenable number.

637968 is an abundant number, since it is smaller than the sum of its proper divisors (1010240).

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

637968 is a wasteful number, since it uses less digits than its factorization.

637968 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 13302 (or 13296 counting only the distinct ones).

The product of its digits is 54432, while the sum is 39.

The square root of 637968 is about 798.7289903340. The cubic root of 637968 is about 86.0860865041.

It can be divided in two parts, 637 and 968, that multiplied together give a palindrome (616616).

The spelling of 637968 in words is "six hundred thirty-seven thousand, nine hundred sixty-eight".