136868520 has 32 divisors (see below), whose sum is σ = 410605920. Its totient is φ = 36498240.

The previous prime is 136868507. The next prime is 136868521. The reversal of 136868520 is 25868631.

It is a happy number.

It is not an unprimeable number, because it can be changed into a prime (136868521) by changing a digit.

It is a polite number, since it can be written in 7 ways as a sum of consecutive naturals, for example, 570166 + ... + 570405.

It is an arithmetic number, because the mean of its divisors is an integer number (12831435).

Almost surely, 2^136868520 is an apocalyptic number.

136868520 is a gapful number since it is divisible by the number (10) formed by its first and last digit.

It is an amenable number.

136868520 is an abundant number, since it is smaller than the sum of its proper divisors (273737400).

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

136868520 is a wasteful number, since it uses less digits than its factorization.

136868520 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 1140585 (or 1140581 counting only the distinct ones).

The product of its (nonzero) digits is 69120, while the sum is 39.

The square root of 136868520 is about 11699.0820152694. The cubic root of 136868520 is about 515.3487065590.

The spelling of 136868520 in words is "one hundred thirty-six million, eight hundred sixty-eight thousand, five hundred twenty".