256288287 has 8 divisors (see below), whose sum is σ = 356575104. Its totient is φ = 163430168.

The previous prime is 256288261. The next prime is 256288289. The reversal of 256288287 is 782882652.

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

It is a cyclic number.

It is not a de Polignac number, because 256288287 - 2⁸ = 256288031 is a prime.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (256288289) by changing a digit.

It is a polite number, since it can be written in 7 ways as a sum of consecutive naturals, for example, 1857093 + ... + 1857230.

It is an arithmetic number, because the mean of its divisors is an integer number (44571888).

Almost surely, 2^256288287 is an apocalyptic number.

256288287 is a deficient number, since it is larger than the sum of its proper divisors (100286817).

256288287 is a wasteful number, since it uses less digits than its factorization.

256288287 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 3714349.

The product of its digits is 860160, while the sum is 48.

The square root of 256288287 is about 16009.0064338796. The cubic root of 256288287 is about 635.1986788150.

The spelling of 256288287 in words is "two hundred fifty-six million, two hundred eighty-eight thousand, two hundred eighty-seven".