256495847 has 8 divisors (see below), whose sum is σ = 272210400. Its totient is φ = 240850944.

The previous prime is 256495819. The next prime is 256495849. The reversal of 256495847 is 748594652.

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 256495847 - 2¹⁶ = 256430311 is a prime.

It is a Duffinian number.

It is a junction number, because it is equal to n+sod(n) for n = 256495795 and 256495804.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (256495849) 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, 9722 + ... + 24647.

It is an arithmetic number, because the mean of its divisors is an integer number (34026300).

Almost surely, 2^256495847 is an apocalyptic number.

256495847 is a deficient number, since it is larger than the sum of its proper divisors (15714553).

256495847 is a wasteful number, since it uses less digits than its factorization.

256495847 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 34825.

The product of its digits is 2419200, while the sum is 50.

The square root of 256495847 is about 16015.4877228263. The cubic root of 256495847 is about 635.3701085017.

The spelling of 256495847 in words is "two hundred fifty-six million, four hundred ninety-five thousand, eight hundred forty-seven".