136439240 has 32 divisors (see below), whose sum is σ = 350844480. Its totient is φ = 46779072.

The previous prime is 136439213. The next prime is 136439257. The reversal of 136439240 is 42934631.

It is a junction number, because it is equal to n+sod(n) for n = 136439197 and 136439206.

It is an unprimeable number.

It is a pernicious number, because its binary representation contains a prime number (11) of ones.

It is a polite number, since it can be written in 7 ways as a sum of consecutive naturals, for example, 243362 + ... + 243921.

It is an arithmetic number, because the mean of its divisors is an integer number (10963890).

Almost surely, 2^136439240 is an apocalyptic number.

136439240 is a gapful number since it is divisible by the number (10) formed by its first and last digit.

It is an amenable number.

136439240 is an abundant number, since it is smaller than the sum of its proper divisors (214405240).

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

136439240 is a wasteful number, since it uses less digits than its factorization.

136439240 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 487301 (or 487297 counting only the distinct ones).

The product of its (nonzero) digits is 15552, while the sum is 32.

The square root of 136439240 is about 11680.7208681656. The cubic root of 136439240 is about 514.8093553943.

It can be divided in two parts, 1364 and 39240, that added together give a palindrome (40604).

The spelling of 136439240 in words is "one hundred thirty-six million, four hundred thirty-nine thousand, two hundred forty".