256424355 has 96 divisors (see below), whose sum is σ = 513257472. Its totient is φ = 117216000.

The previous prime is 256424347. The next prime is 256424383. The reversal of 256424355 is 553424652.

256424355 is a `hidden beast` number, since 2 + 5 + 642 + 4 + 3 + 5 + 5 = 666.

It is not a de Polignac number, because 256424355 - 2³ = 256424347 is a prime.

It is an unprimeable number.

It is a polite number, since it can be written in 95 ways as a sum of consecutive naturals, for example, 1149774 + ... + 1149996.

It is an arithmetic number, because the mean of its divisors is an integer number (5346432).

Almost surely, 2^256424355 is an apocalyptic number.

256424355 is a primitive abundant number, since it is smaller than the sum of its proper divisors, none of which is abundant.

256424355 is a wasteful number, since it uses less digits than its factorization.

256424355 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 369 (or 366 counting only the distinct ones).

The product of its digits is 144000, while the sum is 36.

The square root of 256424355 is about 16013.2556027811. The cubic root of 256424355 is about 635.3110716775.

The spelling of 256424355 in words is "two hundred fifty-six million, four hundred twenty-four thousand, three hundred fifty-five".