636395 has 8 divisors (see below), whose sum is σ = 808704. Its totient is φ = 479104.

The previous prime is 636359. The next prime is 636403. The reversal of 636395 is 593636.

It is a sphenic number, since it is the product of 3 distinct primes.

It is a cyclic number.

It is not a de Polignac number, because 636395 - 2⁶ = 636331 is a prime.

It is a Duffinian number.

It is a nialpdrome in base 15.

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, 3659 + ... + 3828.

It is an arithmetic number, because the mean of its divisors is an integer number (101088).

2⁶³⁶³⁹⁵ is an apocalyptic number.

636395 is a deficient number, since it is larger than the sum of its proper divisors (172309).

636395 is a wasteful number, since it uses less digits than its factorization.

636395 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 7509.

The product of its digits is 14580, while the sum is 32.

The square root of 636395 is about 797.7436931747. The cubic root of 636395 is about 86.0152758154.

The spelling of 636395 in words is "six hundred thirty-six thousand, three hundred ninety-five".