636432 has 20 divisors (see below), whose sum is σ = 1644240. Its totient is φ = 212128.

The previous prime is 636421. The next prime is 636469. The reversal of 636432 is 234636.

636432 is nontrivially palindromic in base 15.

It is a Harshad number since it is a multiple of its sum of digits (24).

It is a nude number because it is divisible by every one of its digits.

It is an inconsummate number, since it does not exist a number n which divided by its sum of digits gives 636432.

It is an unprimeable number.

636432 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, 6582 + ... + 6677.

It is an arithmetic number, because the mean of its divisors is an integer number (82212).

2⁶³⁶⁴³² is an apocalyptic number.

It is an amenable number.

636432 is an abundant number, since it is smaller than the sum of its proper divisors (1007808).

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

636432 is a wasteful number, since it uses less digits than its factorization.

636432 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 13270 (or 13264 counting only the distinct ones).

The product of its digits is 2592, while the sum is 24.

The square root of 636432 is about 797.7668832435. The cubic root of 636432 is about 86.0169427589.

The spelling of 636432 in words is "six hundred thirty-six thousand, four hundred thirty-two".