634931136 has 140 divisors (see below), whose sum is σ = 2151134128. Its totient is φ = 181398528.

The previous prime is 634931117. The next prime is 634931153. The reversal of 634931136 is 631139436.

634931136 is a `hidden beast` number, since 634 + 9 + 3 + 1 + 13 + 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 634931136.

It is a congruent number.

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 19 ways as a sum of consecutive naturals, for example, 27540 + ... + 45036.

Almost surely, 2^634931136 is an apocalyptic number.

It is an amenable number.

It is a practical number, because each smaller number is the sum of distinct divisors of 634931136, and also a Zumkeller number, because its divisors can be partitioned in two sets with the same sum (1075567064).

634931136 is an abundant number, since it is smaller than the sum of its proper divisors (1516202992).

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

634931136 is a wasteful number, since it uses less digits than its factorization.

634931136 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 17528 (or 17509 counting only the distinct ones).

The product of its digits is 34992, while the sum is 36.

The square root of 634931136 is about 25197.8399074206. The cubic root of 634931136 is about 859.4927313147.

The spelling of 634931136 in words is "six hundred thirty-four million, nine hundred thirty-one thousand, one hundred thirty-six".