636874 has 8 divisors (see below), whose sum is σ = 1091808. Its totient is φ = 272940.

The previous prime is 636863. The next prime is 636877. The reversal of 636874 is 478636.

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

It is not an unprimeable number, because it can be changed into a prime (636877) by changing a digit.

It is a polite number, since it can be written in 3 ways as a sum of consecutive naturals, for example, 22732 + ... + 22759.

It is an arithmetic number, because the mean of its divisors is an integer number (136476).

2⁶³⁶⁸⁷⁴ is an apocalyptic number.

636874 is a deficient number, since it is larger than the sum of its proper divisors (454934).

636874 is a wasteful number, since it uses less digits than its factorization.

636874 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 45500.

The product of its digits is 24192, while the sum is 34.

The square root of 636874 is about 798.0438584439. The cubic root of 636874 is about 86.0368509819.

The spelling of 636874 in words is "six hundred thirty-six thousand, eight hundred seventy-four".