256260689 has 8 divisors (see below), whose sum is σ = 258232320. Its totient is φ = 254296000.

The previous prime is 256260679. The next prime is 256260691. The reversal of 256260689 is 986062652.

256260689 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 256260689 - 2¹⁶ = 256195153 is a prime.

It is a Duffinian number.

It is not an unprimeable number, because it can be changed into a prime (256260629) 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, 90089 + ... + 92889.

It is an arithmetic number, because the mean of its divisors is an integer number (32279040).

Almost surely, 2^256260689 is an apocalyptic number.

It is an amenable number.

256260689 is a deficient number, since it is larger than the sum of its proper divisors (1971631).

256260689 is a wasteful number, since it uses less digits than its factorization.

256260689 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 3471.

The product of its (nonzero) digits is 311040, while the sum is 44.

The square root of 256260689 is about 16008.1444583687. The cubic root of 256260689 is about 635.1758778739.

The spelling of 256260689 in words is "two hundred fifty-six million, two hundred sixty thousand, six hundred eighty-nine".