256423335 has 64 divisors (see below), whose sum is σ = 500121600. Its totient is φ = 109579392.

The previous prime is 256423327. The next prime is 256423337. The reversal of 256423335 is 533324652.

It is not a de Polignac number, because 256423335 - 2³ = 256423327 is a prime.

It is a junction number, because it is equal to n+sod(n) for n = 256423296 and 256423305.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (256423337) by changing a digit.

It is a polite number, since it can be written in 63 ways as a sum of consecutive naturals, for example, 156792 + ... + 158418.

It is an arithmetic number, because the mean of its divisors is an integer number (7814400).

Almost surely, 2^256423335 is an apocalyptic number.

256423335 is a deficient number, since it is larger than the sum of its proper divisors (243698265).

256423335 is a wasteful number, since it uses less digits than its factorization.

256423335 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 1740.

The product of its digits is 64800, while the sum is 33.

The square root of 256423335 is about 16013.2237541352. The cubic root of 256423335 is about 635.3102293002.

Adding to 256423335 its reverse (533324652), we get a palindrome (789747987).

The spelling of 256423335 in words is "two hundred fifty-six million, four hundred twenty-three thousand, three hundred thirty-five".