256467769 has 4 divisors (see below), whose sum is σ = 257884900. Its totient is φ = 255050640.

The previous prime is 256467707. The next prime is 256467787. The reversal of 256467769 is 967764652.

It is a semiprime because it is the product of two primes.

It can be written as a sum of positive squares in 2 ways, for example, as 6827769 + 249640000 = 2613^2 + 15800^2 .

It is a cyclic number.

It is not a de Polignac number, because 256467769 - 2⁹ = 256467257 is a prime.

It is a super-2 number, since 2×256467769² = 131551433071674722, which contains 22 as substring.

It is a Duffinian number.

It is not an unprimeable number, because it can be changed into a prime (256467569) by changing a digit.

It is a polite number, since it can be written in 3 ways as a sum of consecutive naturals, for example, 708294 + ... + 708655.

It is an arithmetic number, because the mean of its divisors is an integer number (64471225).

Almost surely, 2^256467769 is an apocalyptic number.

It is an amenable number.

256467769 is a deficient number, since it is larger than the sum of its proper divisors (1417131).

256467769 is a wasteful number, since it uses less digits than its factorization.

256467769 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 1417130.

The product of its digits is 3810240, while the sum is 52.

The square root of 256467769 is about 16014.6111098584. The cubic root of 256467769 is about 635.3469234962.

The spelling of 256467769 in words is "two hundred fifty-six million, four hundred sixty-seven thousand, seven hundred sixty-nine".