635996 has 24 divisors (see below), whose sum is σ = 1204224. Its totient is φ = 293040.

The previous prime is 635989. The next prime is 636017. The reversal of 635996 is 699536.

635996 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 inconsummate number, since it does not exist a number n which divided by its sum of digits gives 635996.

It is an unprimeable number.

635996 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, 2741 + ... + 2963.

It is an arithmetic number, because the mean of its divisors is an integer number (50176).

2⁶³⁵⁹⁹⁶ is an apocalyptic number.

It is an amenable number.

635996 is a deficient number, since it is larger than the sum of its proper divisors (568228).

635996 is a wasteful number, since it uses less digits than its factorization.

635996 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 281 (or 279 counting only the distinct ones).

The product of its digits is 43740, while the sum is 38.

The square root of 635996 is about 797.4935736418. The cubic root of 635996 is about 85.9972957506.

The spelling of 635996 in words is "six hundred thirty-five thousand, nine hundred ninety-six".