256508923 has 8 divisors (see below), whose sum is σ = 285108336. Its totient is φ = 228789600.

The previous prime is 256508921. The next prime is 256508929. The reversal of 256508923 is 329805652.

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 256508923 - 2¹ = 256508921 is a prime.

It is a Duffinian number.

It is not an unprimeable number, because it can be changed into a prime (256508921) 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, 219408 + ... + 220573.

It is an arithmetic number, because the mean of its divisors is an integer number (35638542).

Almost surely, 2^256508923 is an apocalyptic number.

256508923 is a deficient number, since it is larger than the sum of its proper divisors (28599413).

256508923 is a wasteful number, since it uses less digits than its factorization.

256508923 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 440045.

The product of its (nonzero) digits is 129600, while the sum is 40.

The square root of 256508923 is about 16015.8959474642. The cubic root of 256508923 is about 635.3809052436.

The spelling of 256508923 in words is "two hundred fifty-six million, five hundred eight thousand, nine hundred twenty-three".