256849277 has 16 divisors (see below), whose sum is σ = 292944960. Its totient is φ = 223679232.

The previous prime is 256849267. The next prime is 256849279. The reversal of 256849277 is 772948652.

It is a cyclic number.

It is not a de Polignac number, because 256849277 - 2⁴ = 256849261 is a prime.

It is a Smith number, since the sum of its digits (50) coincides with the sum of the digits of its prime factors. Since it is squarefree, it is also a hoax number.

It is a Duffinian number.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (256849279) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (19) of ones.

It is a polite number, since it can be written in 15 ways as a sum of consecutive naturals, for example, 4643 + ... + 23135.

It is an arithmetic number, because the mean of its divisors is an integer number (18309060).

Almost surely, 2^256849277 is an apocalyptic number.

It is an amenable number.

256849277 is a deficient number, since it is larger than the sum of its proper divisors (36095683).

256849277 is a wasteful number, since it uses less digits than its factorization.

256849277 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 18572.

The product of its digits is 1693440, while the sum is 50.

The square root of 256849277 is about 16026.5179312289. The cubic root of 256849277 is about 635.6618036666.

The spelling of 256849277 in words is "two hundred fifty-six million, eight hundred forty-nine thousand, two hundred seventy-seven".