28256669259 has 32 divisors (see below), whose sum is σ = 47244847104. Its totient is φ = 14623390080.

The previous prime is 28256669239. The next prime is 28256669279. The reversal of 28256669259 is 95296665282.

It is an interprime number because it is at equal distance from previous prime (28256669239) and next prime (28256669279).

It is not a de Polignac number, because 28256669259 - 2¹⁶ = 28256603723 is a prime.

It is a super-2 number, since 2×28256669259² (a number of 22 digits) contains 22 as substring.

It is not an unprimeable number, because it can be changed into a prime (28256669209) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (17) of ones.

It is a polite number, since it can be written in 31 ways as a sum of consecutive naturals, for example, 961987 + ... + 990924.

It is an arithmetic number, because the mean of its divisors is an integer number (1476401472).

Almost surely, 2^28256669259 is an apocalyptic number.

28256669259 is a deficient number, since it is larger than the sum of its proper divisors (18988177845).

28256669259 is a wasteful number, since it uses less digits than its factorization.

28256669259 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 1952987.

The product of its digits is 27993600, while the sum is 60.

The spelling of 28256669259 in words is "twenty-eight billion, two hundred fifty-six million, six hundred sixty-nine thousand, two hundred fifty-nine".