636398 has 16 divisors (see below), whose sum is σ = 1102464. Its totient is φ = 269880.

The previous prime is 636359. The next prime is 636403. The reversal of 636398 is 893636.

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 636398.

It is an unprimeable number.

It is a pernicious number, because its binary representation contains a prime number (13) of ones.

It is a polite number, since it can be written in 7 ways as a sum of consecutive naturals, for example, 1661 + ... + 2007.

It is an arithmetic number, because the mean of its divisors is an integer number (68904).

2⁶³⁶³⁹⁸ is an apocalyptic number.

636398 is a deficient number, since it is larger than the sum of its proper divisors (466066).

636398 is a wasteful number, since it uses less digits than its factorization.

636398 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 487.

The product of its digits is 23328, while the sum is 35.

The square root of 636398 is about 797.7455734757. The cubic root of 636398 is about 86.0154109754.

The spelling of 636398 in words is "six hundred thirty-six thousand, three hundred ninety-eight".