136518990 has 64 divisors (see below), whose sum is σ = 351475200. Its totient is φ = 33830784.

The previous prime is 136518983. The next prime is 136519003. The reversal of 136518990 is 99815631.

It is a congruent number.

It is an unprimeable number.

It is a polite number, since it can be written in 31 ways as a sum of consecutive naturals, for example, 27951 + ... + 32469.

It is an arithmetic number, because the mean of its divisors is an integer number (5491800).

Almost surely, 2^136518990 is an apocalyptic number.

136518990 is a gapful number since it is divisible by the number (10) formed by its first and last digit.

It is a practical number, because each smaller number is the sum of distinct divisors of 136518990, and also a Zumkeller number, because its divisors can be partitioned in two sets with the same sum (175737600).

136518990 is an abundant number, since it is smaller than the sum of its proper divisors (214956210).

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

136518990 is a wasteful number, since it uses less digits than its factorization.

136518990 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 4601.

The product of its (nonzero) digits is 58320, while the sum is 42.

The square root of 136518990 is about 11684.1341142594. The cubic root of 136518990 is about 514.9096394706.

The spelling of 136518990 in words is "one hundred thirty-six million, five hundred eighteen thousand, nine hundred ninety".