256059839 has 12 divisors (see below), whose sum is σ = 298638504. Its totient is φ = 218910384.

The previous prime is 256059833. The next prime is 256059841. The reversal of 256059839 is 938950652.

It is a de Polignac number, because none of the positive numbers 2^k-256059839 is a prime.

It is a super-2 number, since 2×256059839² = 131133282297411842, which contains 22 as substring.

It is a Smith number, since the sum of its digits (47) coincides with the sum of the digits of its prime factors.

It is a Duffinian number.

It is a junction number, because it is equal to n+sod(n) for n = 256059793 and 256059802.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (256059833) 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 11 ways as a sum of consecutive naturals, for example, 12872 + ... + 26034.

It is an arithmetic number, because the mean of its divisors is an integer number (24886542).

Almost surely, 2^256059839 is an apocalyptic number.

256059839 is a deficient number, since it is larger than the sum of its proper divisors (42578665).

256059839 is a wasteful number, since it uses less digits than its factorization.

256059839 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 13574 (or 13567 counting only the distinct ones).

The product of its (nonzero) digits is 583200, while the sum is 47.

The square root of 256059839 is about 16001.8698594883. The cubic root of 256059839 is about 635.0098901057.

The spelling of 256059839 in words is "two hundred fifty-six million, fifty-nine thousand, eight hundred thirty-nine".