256103986 has 8 divisors (see below), whose sum is σ = 390453804. Its totient is φ = 125952720.

The previous prime is 256103957. The next prime is 256104049. The reversal of 256103986 is 689301652.

It can be written as a sum of positive squares in 2 ways, for example, as 151757761 + 104346225 = 12319^2 + 10215^2 .

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

It is an unprimeable number.

It is a polite number, since it can be written in 3 ways as a sum of consecutive naturals, for example, 1049485 + ... + 1049728.

Almost surely, 2^256103986 is an apocalyptic number.

256103986 is a deficient number, since it is larger than the sum of its proper divisors (134349818).

256103986 is a wasteful number, since it uses less digits than its factorization.

256103986 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 2099276.

The product of its (nonzero) digits is 77760, while the sum is 40.

The square root of 256103986 is about 16003.2492325777. The cubic root of 256103986 is about 635.0463817982.

The spelling of 256103986 in words is "two hundred fifty-six million, one hundred three thousand, nine hundred eighty-six".