28038476565 has 32 divisors (see below), whose sum is σ = 54377654400. Its totient is φ = 13594412160.

The previous prime is 28038476563. The next prime is 28038476573. The reversal of 28038476565 is 56567483082.

28038476565 is a `hidden beast` number, since 2 + 8 + 0 + 3 + 8 + 4 + 76 + 565 = 666.

It is not a de Polignac number, because 28038476565 - 2¹ = 28038476563 is a prime.

It is a Smith number, since the sum of its digits (54) coincides with the sum of the digits of its prime factors.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (28038476563) 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, 9439080 + ... + 9442049.

It is an arithmetic number, because the mean of its divisors is an integer number (1699301700).

Almost surely, 2^28038476565 is an apocalyptic number.

It is an amenable number.

28038476565 is a deficient number, since it is larger than the sum of its proper divisors (26339177835).

28038476565 is a wasteful number, since it uses less digits than its factorization.

28038476565 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 18881154 (or 18881148 counting only the distinct ones).

The product of its (nonzero) digits is 9676800, while the sum is 54.

The spelling of 28038476565 in words is "twenty-eight billion, thirty-eight million, four hundred seventy-six thousand, five hundred sixty-five".