256392623 has 16 divisors (see below), whose sum is σ = 275127840. Its totient is φ = 238089216.

The previous prime is 256392611. The next prime is 256392629. The reversal of 256392623 is 326293652.

It is a happy number.

It is not a de Polignac number, because 256392623 - 2⁴ = 256392607 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 (256392629) 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, 658913 + ... + 659301.

It is an arithmetic number, because the mean of its divisors is an integer number (17195490).

Almost surely, 2^256392623 is an apocalyptic number.

256392623 is a deficient number, since it is larger than the sum of its proper divisors (18735217).

256392623 is a wasteful number, since it uses less digits than its factorization.

256392623 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 826.

The product of its digits is 116640, while the sum is 38.

The square root of 256392623 is about 16012.2647679833. The cubic root of 256392623 is about 635.2848644391.

The spelling of 256392623 in words is "two hundred fifty-six million, three hundred ninety-two thousand, six hundred twenty-three".