136889520 has 40 divisors (see below), whose sum is σ = 424358256. Its totient is φ = 36503808.

The previous prime is 136889507. The next prime is 136889531. The reversal of 136889520 is 25988631.

It is a tau number, because it is divible by the number of its divisors (40).

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, 284947 + ... + 285426.

Almost surely, 2^136889520 is an apocalyptic number.

136889520 is a gapful number since it is divisible by the number (10) formed by its first and last digit.

It is an amenable number.

136889520 is an abundant number, since it is smaller than the sum of its proper divisors (287468736).

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

136889520 is a wasteful number, since it uses less digits than its factorization.

136889520 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 570389 (or 570383 counting only the distinct ones).

The product of its (nonzero) digits is 103680, while the sum is 42.

The square root of 136889520 is about 11699.9794871615. The cubic root of 136889520 is about 515.3750621919.

The spelling of 136889520 in words is "one hundred thirty-six million, eight hundred eighty-nine thousand, five hundred twenty".