240139256 has 64 divisors (see below), whose sum is σ = 540518400. Its totient is φ = 97840512.

The previous prime is 240139241. The next prime is 240139283. The reversal of 240139256 is 652931042.

It is a happy number.

It is a congruent number.

It is an unprimeable number.

It is a polite number, since it can be written in 15 ways as a sum of consecutive naturals, for example, 107705 + ... + 109911.

It is an arithmetic number, because the mean of its divisors is an integer number (8445600).

Almost surely, 2^240139256 is an apocalyptic number.

It is an amenable number.

It is a practical number, because each smaller number is the sum of distinct divisors of 240139256, and also a Zumkeller number, because its divisors can be partitioned in two sets with the same sum (270259200).

240139256 is an abundant number, since it is smaller than the sum of its proper divisors (300379144).

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

240139256 is a wasteful number, since it uses less digits than its factorization.

240139256 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 2316 (or 2312 counting only the distinct ones).

The product of its (nonzero) digits is 12960, while the sum is 32.

The square root of 240139256 is about 15496.4272011325. The cubic root of 240139256 is about 621.5666726096.

The spelling of 240139256 in words is "two hundred forty million, one hundred thirty-nine thousand, two hundred fifty-six".