256588849 has 16 divisors (see below), whose sum is σ = 283688064. Its totient is φ = 232058640.

The previous prime is 256588831. The next prime is 256588859. The reversal of 256588849 is 948885652.

It is a happy number.

It is not a de Polignac number, because 256588849 - 2⁹ = 256588337 is a prime.

It is a super-2 number, since 2×256588849² = 131675674862289602, which contains 22 as substring.

It is a self number, because there is not a number n which added to its sum of digits gives 256588849.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (256588819) by changing a digit.

It is a polite number, since it can be written in 15 ways as a sum of consecutive naturals, for example, 349687 + ... + 350419.

It is an arithmetic number, because the mean of its divisors is an integer number (17730504).

Almost surely, 2^256588849 is an apocalyptic number.

It is an amenable number.

256588849 is a deficient number, since it is larger than the sum of its proper divisors (27099215).

256588849 is an equidigital number, since it uses as much as digits as its factorization.

256588849 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 1029 (or 1007 counting only the distinct ones).

The product of its digits is 5529600, while the sum is 55.

The square root of 256588849 is about 16018.3909616416. The cubic root of 256588849 is about 635.4468914869.

The spelling of 256588849 in words is "two hundred fifty-six million, five hundred eighty-eight thousand, eight hundred forty-nine".