256847270 has 16 divisors (see below), whose sum is σ = 467093088. Its totient is φ = 101679360.

The previous prime is 256847267. The next prime is 256847291. The reversal of 256847270 is 72748652.

It is a Curzon number.

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 7 ways as a sum of consecutive naturals, for example, 131426 + ... + 133365.

It is an arithmetic number, because the mean of its divisors is an integer number (29193318).

Almost surely, 2^256847270 is an apocalyptic number.

256847270 is a deficient number, since it is larger than the sum of its proper divisors (210245818).

256847270 is a wasteful number, since it uses less digits than its factorization.

256847270 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 264895.

The product of its (nonzero) digits is 188160, while the sum is 41.

The square root of 256847270 is about 16026.4553161328. The cubic root of 256847270 is about 635.6601479919.

The spelling of 256847270 in words is "two hundred fifty-six million, eight hundred forty-seven thousand, two hundred seventy".