28500408369 has 12 divisors (see below), whose sum is σ = 41731192516. Its totient is φ = 18739994112.

The previous prime is 28500408197. The next prime is 28500408383. The reversal of 28500408369 is 96380400582.

28500408369 is a `hidden beast` number, since 2 + 8 + 500 + 4 + 0 + 83 + 69 = 666.

It can be written as a sum of positive squares in 2 ways, for example, as 13971240000 + 14529168369 = 118200^2 + 120537^2 .

It is not a de Polignac number, because 28500408369 - 2¹⁵ = 28500375601 is a prime.

It is a super-2 number, since 2×28500408369² (a number of 22 digits) contains 22 as substring.

It is a Duffinian number.

It is not an unprimeable number, because it can be changed into a prime (28500408389) by changing a digit.

It is a polite number, since it can be written in 11 ways as a sum of consecutive naturals, for example, 21689152 + ... + 21690465.

Almost surely, 2^28500408369 is an apocalyptic number.

It is an amenable number.

28500408369 is a deficient number, since it is larger than the sum of its proper divisors (13230784147).

28500408369 is a wasteful number, since it uses less digits than its factorization.

28500408369 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 43379696 (or 43379693 counting only the distinct ones).

The product of its (nonzero) digits is 414720, while the sum is 45.

The spelling of 28500408369 in words is "twenty-eight billion, five hundred million, four hundred eight thousand, three hundred sixty-nine".