256708423 has 8 divisors (see below), whose sum is σ = 260895600. Its totient is φ = 252531840.

The previous prime is 256708399. The next prime is 256708453. The reversal of 256708423 is 324807652.

It is a sphenic number, since it is the product of 3 distinct primes.

It is a cyclic number.

It is not a de Polignac number, because 256708423 - 2¹³ = 256700231 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 (256708453) by changing a digit.

It is a polite number, since it can be written in 7 ways as a sum of consecutive naturals, for example, 56853 + ... + 61201.

It is an arithmetic number, because the mean of its divisors is an integer number (32611950).

Almost surely, 2^256708423 is an apocalyptic number.

256708423 is a deficient number, since it is larger than the sum of its proper divisors (4187177).

256708423 is an equidigital number, since it uses as much as digits as its factorization.

256708423 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 5297.

The product of its (nonzero) digits is 80640, while the sum is 37.

The square root of 256708423 is about 16022.1229242569. The cubic root of 256708423 is about 635.5455852102.

The spelling of 256708423 in words is "two hundred fifty-six million, seven hundred eight thousand, four hundred twenty-three".