636774 has 8 divisors (see below), whose sum is σ = 1273560. Its totient is φ = 212256.

The previous prime is 636773. The next prime is 636781. The reversal of 636774 is 477636.

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

636774 is an admirable number.

It is a super-2 number, since 2×636774² = 810962254152, which contains 22 as substring.

It is a Curzon number.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (636773) 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, 53059 + ... + 53070.

It is an arithmetic number, because the mean of its divisors is an integer number (159195).

2⁶³⁶⁷⁷⁴ is an apocalyptic number.

636774 is a primitive abundant number, since it is smaller than the sum of its proper divisors, none of which is abundant.

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

636774 is a wasteful number, since it uses less digits than its factorization.

636774 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 106134.

The product of its digits is 21168, while the sum is 33.

The square root of 636774 is about 797.9812027861. The cubic root of 636774 is about 86.0323476655.

It can be divided in two parts, 6367 and 74, that added together give a triangular number (6441 = T₁₁₃).

The spelling of 636774 in words is "six hundred thirty-six thousand, seven hundred seventy-four".