2256387839 has 4 divisors (see below), whose sum is σ = 2256565680. Its totient is φ = 2256210000.

The previous prime is 2256387827. The next prime is 2256387841. The reversal of 2256387839 is 9387836522.

It is a semiprime because it is the product of two primes.

It is a cyclic number.

It is not a de Polignac number, because 2256387839 - 2⁴ = 2256387823 is a prime.

It is a Duffinian number.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (2256387869) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (23) of ones.

It is a polite number, since it can be written in 3 ways as a sum of consecutive naturals, for example, 68294 + ... + 95795.

It is an arithmetic number, because the mean of its divisors is an integer number (564141420).

Almost surely, 2^2256387839 is an apocalyptic number.

2256387839 is a deficient number, since it is larger than the sum of its proper divisors (177841).

2256387839 is a wasteful number, since it uses less digits than its factorization.

2256387839 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 177840.

The product of its digits is 4354560, while the sum is 53.

The square root of 2256387839 is about 47501.4509146826. The cubic root of 2256387839 is about 1311.6095901681.

The spelling of 2256387839 in words is "two billion, two hundred fifty-six million, three hundred eighty-seven thousand, eight hundred thirty-nine".