28104013765 has 16 divisors (see below), whose sum is σ = 33884783856. Its totient is φ = 22376678400.

The previous prime is 28104013681. The next prime is 28104013781. The reversal of 28104013765 is 56731040182.

It can be written as a sum of positive squares in 8 ways, for example, as 2350504324 + 25753509441 = 48482^2 + 160479^2 .

It is not a de Polignac number, because 28104013765 - 2²³ = 28095625157 is a prime.

It is a super-3 number, since 3×28104013765³ (a number of 32 digits) contains 333 as substring.

It is a Duffinian number.

It is a congruent number.

It is an unprimeable number.

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 15 ways as a sum of consecutive naturals, for example, 2371555 + ... + 2383375.

It is an arithmetic number, because the mean of its divisors is an integer number (2117798991).

Almost surely, 2^28104013765 is an apocalyptic number.

It is an amenable number.

28104013765 is a deficient number, since it is larger than the sum of its proper divisors (5780770091).

28104013765 is a wasteful number, since it uses less digits than its factorization.

28104013765 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 14040.

The product of its (nonzero) digits is 40320, while the sum is 37.

The spelling of 28104013765 in words is "twenty-eight billion, one hundred four million, thirteen thousand, seven hundred sixty-five".