256769089 has 8 divisors (see below), whose sum is σ = 258469920. Its totient is φ = 255074400.

The previous prime is 256769083. The next prime is 256769111. The reversal of 256769089 is 980967652.

It is a happy number.

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 256769089 - 2¹⁷ = 256638017 is a prime.

It is a Duffinian number.

It is not an unprimeable number, because it can be changed into a prime (256769083) 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, 105294 + ... + 107704.

It is an arithmetic number, because the mean of its divisors is an integer number (32308740).

Almost surely, 2^256769089 is an apocalyptic number.

It is an amenable number.

256769089 is a deficient number, since it is larger than the sum of its proper divisors (1700831).

256769089 is a wasteful number, since it uses less digits than its factorization.

256769089 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 3071.

The product of its (nonzero) digits is 1632960, while the sum is 52.

The square root of 256769089 is about 16024.0160072311. The cubic root of 256769089 is about 635.5956458603.

The spelling of 256769089 in words is "two hundred fifty-six million, seven hundred sixty-nine thousand, eighty-nine".