256886278 has 8 divisors (see below), whose sum is σ = 420359400. Its totient is φ = 116766480.

The previous prime is 256886261. The next prime is 256886293. The reversal of 256886278 is 872688652.

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 polite number, since it can be written in 3 ways as a sum of consecutive naturals, for example, 5838303 + ... + 5838346.

It is an arithmetic number, because the mean of its divisors is an integer number (52544925).

Almost surely, 2^256886278 is an apocalyptic number.

256886278 is a deficient number, since it is larger than the sum of its proper divisors (163473122).

256886278 is a wasteful number, since it uses less digits than its factorization.

256886278 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 11676662.

The product of its digits is 2580480, while the sum is 52.

The square root of 256886278 is about 16027.6722576923. The cubic root of 256886278 is about 635.6923260977.

The spelling of 256886278 in words is "two hundred fifty-six million, eight hundred eighty-six thousand, two hundred seventy-eight".