636996 has 24 divisors (see below), whose sum is σ = 1503040. Its totient is φ = 209952.

The previous prime is 636983. The next prime is 636997. The reversal of 636996 is 699636.

It is not an unprimeable number, because it can be changed into a prime (636997) by changing a digit.

636996 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 7 ways as a sum of consecutive naturals, for example, 1065 + ... + 1551.

2⁶³⁶⁹⁹⁶ is an apocalyptic number.

It is an amenable number.

636996 is an abundant number, since it is smaller than the sum of its proper divisors (866044).

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

636996 is a wasteful number, since it uses less digits than its factorization.

636996 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 603 (or 601 counting only the distinct ones).

The product of its digits is 52488, while the sum is 39.

The square root of 636996 is about 798.1202916854. The cubic root of 636996 is about 86.0423443897.

The spelling of 636996 in words is "six hundred thirty-six thousand, nine hundred ninety-six".