256123885 has 8 divisors (see below), whose sum is σ = 307436256. Its totient is φ = 204840720.

The previous prime is 256123871. The next prime is 256123919. The reversal of 256123885 is 588321652.

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

It is not a de Polignac number, because 256123885 - 2⁷ = 256123757 is a prime.

It is a Duffinian number.

It is a congruent number.

It is an unprimeable number.

It is a polite number, since it can be written in 7 ways as a sum of consecutive naturals, for example, 24970 + ... + 33700.

It is an arithmetic number, because the mean of its divisors is an integer number (38429532).

Almost surely, 2^256123885 is an apocalyptic number.

It is an amenable number.

256123885 is a deficient number, since it is larger than the sum of its proper divisors (51312371).

256123885 is an equidigital number, since it uses as much as digits as its factorization.

256123885 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 14603.

The product of its digits is 115200, while the sum is 40.

The square root of 256123885 is about 16003.8709379950. The cubic root of 256123885 is about 635.0628288423.

The spelling of 256123885 in words is "two hundred fifty-six million, one hundred twenty-three thousand, eight hundred eighty-five".