256024439 has 16 divisors (see below), whose sum is σ = 283159584. Its totient is φ = 229555200.

The previous prime is 256024427. The next prime is 256024481. The reversal of 256024439 is 934420652.

It is a cyclic number.

It is not a de Polignac number, because 256024439 - 2²⁴ = 239247223 is a prime.

It is a Duffinian number.

It is a junction number, because it is equal to n+sod(n) for n = 256024399 and 256024408.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (256027439) by changing a digit.

It is a polite number, since it can be written in 15 ways as a sum of consecutive naturals, for example, 348917 + ... + 349649.

It is an arithmetic number, because the mean of its divisors is an integer number (17697474).

Almost surely, 2^256024439 is an apocalyptic number.

256024439 is a deficient number, since it is larger than the sum of its proper divisors (27135145).

256024439 is a wasteful number, since it uses less digits than its factorization.

256024439 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 1138.

The product of its (nonzero) digits is 51840, while the sum is 35.

The square root of 256024439 is about 16000.7637005238. The cubic root of 256024439 is about 634.9806256101.

The spelling of 256024439 in words is "two hundred fifty-six million, twenty-four thousand, four hundred thirty-nine".