256272858 has 96 divisors (see below), whose sum is σ = 609762816. Its totient is φ = 77474304.

The previous prime is 256272829. The next prime is 256272869. The reversal of 256272858 is 858272652.

256272858 is a `hidden beast` number, since 2 + 562 + 7 + 2 + 85 + 8 = 666.

It is a Curzon number.

It is an unprimeable number.

It is a polite number, since it can be written in 47 ways as a sum of consecutive naturals, for example, 1481260 + ... + 1481432.

It is an arithmetic number, because the mean of its divisors is an integer number (6351696).

Almost surely, 2^256272858 is an apocalyptic number.

It is a practical number, because each smaller number is the sum of distinct divisors of 256272858, and also a Zumkeller number, because its divisors can be partitioned in two sets with the same sum (304881408).

256272858 is an abundant number, since it is smaller than the sum of its proper divisors (353489958).

It is a pseudoperfect number, because it is the sum of a subset of its proper divisors.

256272858 is a wasteful number, since it uses less digits than its factorization.

256272858 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 348 (or 345 counting only the distinct ones).

The product of its digits is 537600, while the sum is 45.

The square root of 256272858 is about 16008.5245416309. The cubic root of 256272858 is about 635.1859318713.

The spelling of 256272858 in words is "two hundred fifty-six million, two hundred seventy-two thousand, eight hundred fifty-eight".