136839520 has 48 divisors (see below), whose sum is σ = 340305840. Its totient is φ = 51853824.

The previous prime is 136839503. The next prime is 136839529. The reversal of 136839520 is 25938631.

It is a self number, because there is not a number n which added to its sum of digits gives 136839520.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (136839529) 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, 19467 + ... + 25546.

It is an arithmetic number, because the mean of its divisors is an integer number (7089705).

Almost surely, 2^136839520 is an apocalyptic number.

136839520 is a gapful number since it is divisible by the number (10) formed by its first and last digit.

It is an amenable number.

136839520 is an abundant number, since it is smaller than the sum of its proper divisors (203466320).

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

136839520 is a wasteful number, since it uses less digits than its factorization.

136839520 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 45047 (or 45039 counting only the distinct ones).

The product of its (nonzero) digits is 38880, while the sum is 37.

The square root of 136839520 is about 11697.8425361261. The cubic root of 136839520 is about 515.3123062528.

The spelling of 136839520 in words is "one hundred thirty-six million, eight hundred thirty-nine thousand, five hundred twenty".