256483689 has 24 divisors (see below), whose sum is σ = 433978848. Its totient is φ = 133237440.

The previous prime is 256483681. The next prime is 256483723. The reversal of 256483689 is 986384652.

256483689 is digitally balanced in base 2, because in such base it contains all the possibile digits an equal number of times.

It is not a de Polignac number, because 256483689 - 2³ = 256483681 is a prime.

It is a Curzon number.

It is not an unprimeable number, because it can be changed into a prime (256483681) by changing a digit.

It is a polite number, since it can be written in 23 ways as a sum of consecutive naturals, for example, 77692 + ... + 80925.

It is an arithmetic number, because the mean of its divisors is an integer number (18082452).

Almost surely, 2^256483689 is an apocalyptic number.

It is an amenable number.

256483689 is a deficient number, since it is larger than the sum of its proper divisors (177495159).

256483689 is a wasteful number, since it uses less digits than its factorization.

256483689 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 158645 (or 158638 counting only the distinct ones).

The product of its digits is 2488320, while the sum is 51.

The square root of 256483689 is about 16015.1081482455. The cubic root of 256483689 is about 635.3600694154.

The spelling of 256483689 in words is "two hundred fifty-six million, four hundred eighty-three thousand, six hundred eighty-nine".