256233857 has 8 divisors (see below), whose sum is σ = 279713280. Its totient is φ = 232785360.

The previous prime is 256233841. The next prime is 256233871. The reversal of 256233857 is 758332652.

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 256233857 - 2⁴ = 256233841 is a prime.

It is not an unprimeable number, because it can be changed into a prime (256233157) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (13) of ones.

It is a polite number, since it can be written in 7 ways as a sum of consecutive naturals, for example, 11744 + ... + 25502.

It is an arithmetic number, because the mean of its divisors is an integer number (34964160).

Almost surely, 2^256233857 is an apocalyptic number.

It is an amenable number.

256233857 is a deficient number, since it is larger than the sum of its proper divisors (23479423).

256233857 is a wasteful number, since it uses less digits than its factorization.

256233857 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 15463.

The product of its digits is 302400, while the sum is 41.

The square root of 256233857 is about 16007.3063630331. The cubic root of 256233857 is about 635.1537082178.

The spelling of 256233857 in words is "two hundred fifty-six million, two hundred thirty-three thousand, eight hundred fifty-seven".