136436868 has 36 divisors (see below), whose sum is σ = 347012848. Its totient is φ = 45198000.

The previous prime is 136436863. The next prime is 136436869. The reversal of 136436868 is 868634631.

136436868 is a `hidden beast` number, since 136 + 436 + 86 + 8 = 666.

It is a tau number, because it is divible by the number of its divisors (36).

It is not an unprimeable number, because it can be changed into a prime (136436863) by changing a digit.

It is a polite number, since it can be written in 11 ways as a sum of consecutive naturals, for example, 5758 + ... + 17493.

Almost surely, 2^136436868 is an apocalyptic number.

136436868 is a gapful number since it is divisible by the number (18) formed by its first and last digit.

It is an amenable number.

136436868 is an abundant number, since it is smaller than the sum of its proper divisors (210575980).

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

136436868 is a wasteful number, since it uses less digits than its factorization.

136436868 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 23424 (or 23419 counting only the distinct ones).

The product of its digits is 497664, while the sum is 45.

The square root of 136436868 is about 11680.6193328950. The cubic root of 136436868 is about 514.8063720520.

The spelling of 136436868 in words is "one hundred thirty-six million, four hundred thirty-six thousand, eight hundred sixty-eight".