136861590 has 32 divisors (see below), whose sum is σ = 339065856. Its totient is φ = 35318880.

The previous prime is 136861553. The next prime is 136861591. The reversal of 136861590 is 95168631.

It is a Curzon number.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (136861591) by changing a digit.

It is a polite number, since it can be written in 15 ways as a sum of consecutive naturals, for example, 72652 + ... + 74511.

It is an arithmetic number, because the mean of its divisors is an integer number (10595808).

Almost surely, 2^136861590 is an apocalyptic number.

136861590 is a gapful number since it is divisible by the number (10) formed by its first and last digit.

136861590 is an abundant number, since it is smaller than the sum of its proper divisors (202204266).

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

136861590 is a wasteful number, since it uses less digits than its factorization.

136861590 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 147204.

The product of its (nonzero) digits is 38880, while the sum is 39.

The square root of 136861590 is about 11698.7858344360. The cubic root of 136861590 is about 515.3400086086.

The spelling of 136861590 in words is "one hundred thirty-six million, eight hundred sixty-one thousand, five hundred ninety".