136805286 has 16 divisors (see below), whose sum is σ = 275194224. Its totient is φ = 45337824.

The previous prime is 136805281. The next prime is 136805299. The reversal of 136805286 is 682508631.

It is a happy number.

It is a Curzon number.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (136805281) by changing a digit.

It is a polite number, since it can be written in 7 ways as a sum of consecutive naturals, for example, 64861 + ... + 66936.

It is an arithmetic number, because the mean of its divisors is an integer number (17199639).

Almost surely, 2^136805286 is an apocalyptic number.

136805286 is an abundant number, since it is smaller than the sum of its proper divisors (138388938).

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

136805286 is a wasteful number, since it uses less digits than its factorization.

136805286 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 131975.

The product of its (nonzero) digits is 69120, while the sum is 39.

The square root of 136805286 is about 11696.3791833199. The cubic root of 136805286 is about 515.2693296993.

The spelling of 136805286 in words is "one hundred thirty-six million, eight hundred five thousand, two hundred eighty-six".