256026239 has 16 divisors (see below), whose sum is σ = 320500800. Its totient is φ = 199417344.

The previous prime is 256026233. The next prime is 256026259. The reversal of 256026239 is 932620652.

It is not a de Polignac number, because 256026239 - 2⁴ = 256026223 is a prime.

It is a Duffinian number.

It is a junction number, because it is equal to n+sod(n) for n = 256026199 and 256026208.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (256026233) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (17) of ones.

It is a polite number, since it can be written in 15 ways as a sum of consecutive naturals, for example, 33644 + ... + 40545.

It is an arithmetic number, because the mean of its divisors is an integer number (20031300).

Almost surely, 2^256026239 is an apocalyptic number.

256026239 is a gapful number since it is divisible by the number (29) formed by its first and last digit.

256026239 is a deficient number, since it is larger than the sum of its proper divisors (64474561).

256026239 is a wasteful number, since it uses less digits than its factorization.

256026239 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 74242.

The product of its (nonzero) digits is 38880, while the sum is 35.

The square root of 256026239 is about 16000.8199477402. The cubic root of 256026239 is about 634.9821137004.

The spelling of 256026239 in words is "two hundred fifty-six million, twenty-six thousand, two hundred thirty-nine".