256990827 has 8 divisors (see below), whose sum is σ = 360688960. Its totient is φ = 162309960.

The previous prime is 256990817. The next prime is 256990831. The reversal of 256990827 is 728099652.

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

It is not a de Polignac number, because 256990827 - 2¹² = 256986731 is a prime.

It is a Duffinian number.

It is not an unprimeable number, because it can be changed into a prime (256990817) 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, 2254249 + ... + 2254362.

It is an arithmetic number, because the mean of its divisors is an integer number (45086120).

Almost surely, 2^256990827 is an apocalyptic number.

256990827 is a deficient number, since it is larger than the sum of its proper divisors (103698133).

256990827 is a wasteful number, since it uses less digits than its factorization.

256990827 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 4508633.

The product of its (nonzero) digits is 544320, while the sum is 48.

The square root of 256990827 is about 16030.9334413190. The cubic root of 256990827 is about 635.7785535954.

The spelling of 256990827 in words is "two hundred fifty-six million, nine hundred ninety thousand, eight hundred twenty-seven".