636434136 has 48 divisors (see below), whose sum is σ = 1856268960. Its totient is φ = 195825600.

The previous prime is 636434111. The next prime is 636434143. The reversal of 636434136 is 631434636.

636434136 is a `hidden beast` number, since 6 + 3 + 643 + 4 + 1 + 3 + 6 = 666.

It is a Harshad number since it is a multiple of its sum of digits (36).

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

It is a self number, because there is not a number n which added to its sum of digits gives 636434136.

It is a congruent number.

It is an unprimeable number.

It is a polite number, since it can be written in 11 ways as a sum of consecutive naturals, for example, 339040 + ... + 340911.

It is an arithmetic number, because the mean of its divisors is an integer number (38672270).

Almost surely, 2^636434136 is an apocalyptic number.

It is an amenable number.

636434136 is an abundant number, since it is smaller than the sum of its proper divisors (1219834824).

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

636434136 is a wasteful number, since it uses less digits than its factorization.

636434136 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 679976 (or 679969 counting only the distinct ones).

The product of its digits is 93312, while the sum is 36.

The square root of 636434136 is about 25227.6462635736. The cubic root of 636434136 is about 860.1703898912.

The spelling of 636434136 in words is "six hundred thirty-six million, four hundred thirty-four thousand, one hundred thirty-six".