256590489 has 8 divisors (see below), whose sum is σ = 342195840. Its totient is φ = 171022736.

The previous prime is 256590443. The next prime is 256590493. The reversal of 256590489 is 984095652.

256590489 is digitally balanced in base 2, because in such base it contains all the possibile digits an equal number of times.

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 256590489 - 2⁷ = 256590361 is a prime.

It is not an unprimeable number, because it can be changed into a prime (256590409) 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, 17647 + ... + 28715.

It is an arithmetic number, because the mean of its divisors is an integer number (42774480).

Almost surely, 2^256590489 is an apocalyptic number.

It is an amenable number.

256590489 is a deficient number, since it is larger than the sum of its proper divisors (85605351).

256590489 is a wasteful number, since it uses less digits than its factorization.

256590489 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 18799.

The product of its (nonzero) digits is 777600, while the sum is 48.

The square root of 256590489 is about 16018.4421527188. The cubic root of 256590489 is about 635.4482453138.

It can be divided in two parts, 2565 and 90489, that multiplied together give a triangular number (232104285 = T₂₁₅₄₅).

The spelling of 256590489 in words is "two hundred fifty-six million, five hundred ninety thousand, four hundred eighty-nine".