256828267 has 2 divisors, whose sum is σ = 256828268. Its totient is φ = 256828266.

The previous prime is 256828261. The next prime is 256828343. The reversal of 256828267 is 762828652.

It is a weak prime.

It is a cyclic number.

It is not a de Polignac number, because 256828267 - 2³ = 256828259 is a prime.

It is a Chen prime.

It is not a weakly prime, because it can be changed into another prime (256828261) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 128414133 + 128414134.

It is an arithmetic number, because the mean of its divisors is an integer number (128414134).

Almost surely, 2^256828267 is an apocalyptic number.

256828267 is a deficient number, since it is larger than the sum of its proper divisors (1).

256828267 is an equidigital number, since it uses as much as digits as its factorization.

256828267 is an evil number, because the sum of its binary digits is even.

The product of its digits is 645120, while the sum is 46.

The square root of 256828267 is about 16025.8624416909. The cubic root of 256828267 is about 635.6444710390.

The spelling of 256828267 in words is "two hundred fifty-six million, eight hundred twenty-eight thousand, two hundred sixty-seven".