256791027 has 8 divisors (see below), whose sum is σ = 354194640. Its totient is φ = 165290720.

The previous prime is 256791013. The next prime is 256791049. The reversal of 256791027 is 720197652.

It is a sphenic number, since it is the product of 3 distinct primes.

It is not a de Polignac number, because 256791027 - 2⁸ = 256790771 is a prime.

It is not an unprimeable number, because it can be changed into a prime (256791727) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (17) of ones.

It is a polite number, since it can be written in 7 ways as a sum of consecutive naturals, for example, 1475724 + ... + 1475897.

It is an arithmetic number, because the mean of its divisors is an integer number (44274330).

Almost surely, 2^256791027 is an apocalyptic number.

256791027 is a deficient number, since it is larger than the sum of its proper divisors (97403613).

256791027 is a wasteful number, since it uses less digits than its factorization.

256791027 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 2951653.

The product of its (nonzero) digits is 52920, while the sum is 39.

The square root of 256791027 is about 16024.7005276230. The cubic root of 256791027 is about 635.6137468193.

The spelling of 256791027 in words is "two hundred fifty-six million, seven hundred ninety-one thousand, twenty-seven".