256855814 has 4 divisors (see below), whose sum is σ = 385283724. Its totient is φ = 128427906.

The previous prime is 256855763. The next prime is 256855817. The reversal of 256855814 is 418558652.

It is a semiprime because it is the product of two primes.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (256855817) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 64213952 + ... + 64213955.

It is an arithmetic number, because the mean of its divisors is an integer number (96320931).

Almost surely, 2^256855814 is an apocalyptic number.

256855814 is a deficient number, since it is larger than the sum of its proper divisors (128427910).

256855814 is a wasteful number, since it uses less digits than its factorization.

256855814 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 128427909.

The product of its digits is 384000, while the sum is 44.

The square root of 256855814 is about 16026.7218731717. The cubic root of 256855814 is about 635.6671963052.

The spelling of 256855814 in words is "two hundred fifty-six million, eight hundred fifty-five thousand, eight hundred fourteen".