256600478 has 8 divisors (see below), whose sum is σ = 386916480. Its totient is φ = 127628320.

The previous prime is 256600469. The next prime is 256600483. The reversal of 256600478 is 874006652.

It is a happy number.

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

It is a congruent number.

It is an unprimeable number.

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 3 ways as a sum of consecutive naturals, for example, 335483 + ... + 336246.

It is an arithmetic number, because the mean of its divisors is an integer number (48364560).

Almost surely, 2^256600478 is an apocalyptic number.

256600478 is a deficient number, since it is larger than the sum of its proper divisors (130316002).

256600478 is a wasteful number, since it uses less digits than its factorization.

256600478 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 671922.

The product of its (nonzero) digits is 80640, while the sum is 38.

The square root of 256600478 is about 16018.7539465465. The cubic root of 256600478 is about 635.4564911510.

The spelling of 256600478 in words is "two hundred fifty-six million, six hundred thousand, four hundred seventy-eight".