136660890 has 32 divisors (see below), whose sum is σ = 330577920. Its totient is φ = 36154944.

The previous prime is 136660883. The next prime is 136660897. The reversal of 136660890 is 98066631.

It is a happy number.

It is an interprime number because it is at equal distance from previous prime (136660883) and next prime (136660897).

It is not an unprimeable number, because it can be changed into a prime (136660897) 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, 14125 + ... + 21744.

It is an arithmetic number, because the mean of its divisors is an integer number (10330560).

Almost surely, 2^136660890 is an apocalyptic number.

136660890 is a gapful number since it is divisible by the number (10) formed by its first and last digit.

136660890 is an abundant number, since it is smaller than the sum of its proper divisors (193917030).

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

136660890 is a wasteful number, since it uses less digits than its factorization.

136660890 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 36006.

The product of its (nonzero) digits is 46656, while the sum is 39.

The square root of 136660890 is about 11690.2048741671. The cubic root of 136660890 is about 515.0879794394.

It can be divided in two parts, 136660 and 890, that added together give a triangular number (137550 = T₅₂₄).

The spelling of 136660890 in words is "one hundred thirty-six million, six hundred sixty thousand, eight hundred ninety".