136539420 has 24 divisors (see below), whose sum is σ = 382310544. Its totient is φ = 36410496.

The previous prime is 136539409. The next prime is 136539437. The reversal of 136539420 is 24935631.

It is a congruent number.

It is an unprimeable number.

It is a polite number, since it can be written in 7 ways as a sum of consecutive naturals, for example, 1137769 + ... + 1137888.

It is an arithmetic number, because the mean of its divisors is an integer number (15929606).

Almost surely, 2^136539420 is an apocalyptic number.

136539420 is a gapful number since it is divisible by the number (10) formed by its first and last digit.

It is an amenable number.

136539420 is an abundant number, since it is smaller than the sum of its proper divisors (245771124).

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

136539420 is a wasteful number, since it uses less digits than its factorization.

136539420 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 2275669 (or 2275667 counting only the distinct ones).

The product of its (nonzero) digits is 19440, while the sum is 33.

The square root of 136539420 is about 11685.0083440278. The cubic root of 136539420 is about 514.9353235146.

The spelling of 136539420 in words is "one hundred thirty-six million, five hundred thirty-nine thousand, four hundred twenty".