636748 has 12 divisors (see below), whose sum is σ = 1273552. Its totient is φ = 272880.

The previous prime is 636739. The next prime is 636749. The reversal of 636748 is 847636.

636748 is an admirable number.

It is an Ulam number.

It is not an unprimeable number, because it can be changed into a prime (636749) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (11) of ones.

It is a polite number, since it can be written in 3 ways as a sum of consecutive naturals, for example, 11343 + ... + 11398.

2⁶³⁶⁷⁴⁸ is an apocalyptic number.

It is an amenable number.

636748 is a primitive abundant number, since it is smaller than the sum of its proper divisors, none of which is abundant.

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

636748 is a wasteful number, since it uses less digits than its factorization.

636748 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 22752 (or 22750 counting only the distinct ones).

The product of its digits is 24192, while the sum is 34.

The square root of 636748 is about 797.9649115093. The cubic root of 636748 is about 86.0311767260.

The spelling of 636748 in words is "six hundred thirty-six thousand, seven hundred forty-eight".