635138136 has 24 divisors (see below), whose sum is σ = 1720165980. Its totient is φ = 211712688.

The previous prime is 635138129. The next prime is 635138149. The reversal of 635138136 is 631831536.

It is a happy number.

635138136 is a `hidden beast` number, since 6 + 3 + 513 + 8 + 136 = 666.

635138136 is digitally balanced in base 2, because in such base it contains all the possibile digits an equal number of times.

It is a tau number, because it is divible by the number of its divisors (24).

It is a hoax number, since the sum of its digits (36) coincides with the sum of the digits of its distinct prime factors.

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

It is a self number, because there is not a number n which added to its sum of digits gives 635138136.

It is a congruent number.

It is an unprimeable number.

It is a polite number, since it can be written in 5 ways as a sum of consecutive naturals, for example, 4410610 + ... + 4410753.

Almost surely, 2^635138136 is an apocalyptic number.

It is an amenable number.

635138136 is an abundant number, since it is smaller than the sum of its proper divisors (1085027844).

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

635138136 is a wasteful number, since it uses less digits than its factorization.

635138136 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 8821375 (or 8821368 counting only the distinct ones).

The product of its digits is 38880, while the sum is 36.

The square root of 635138136 is about 25201.9470676375. The cubic root of 635138136 is about 859.5861249938.

The spelling of 635138136 in words is "six hundred thirty-five million, one hundred thirty-eight thousand, one hundred thirty-six".