28365685804 has 12 divisors (see below), whose sum is σ = 49899846528. Its totient is φ = 14108586800.

The previous prime is 28365685793. The next prime is 28365685849. The reversal of 28365685804 is 40858656382.

It is a super-2 number, since 2×28365685804² (a number of 22 digits) contains 22 as substring.

It is an unprimeable number.

It is a polite number, since it can be written in 3 ways as a sum of consecutive naturals, for example, 18563167 + ... + 18564694.

It is an arithmetic number, because the mean of its divisors is an integer number (4158320544).

Almost surely, 2^28365685804 is an apocalyptic number.

It is an amenable number.

28365685804 is a deficient number, since it is larger than the sum of its proper divisors (21534160724).

28365685804 is a wasteful number, since it uses less digits than its factorization.

28365685804 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 37128056 (or 37128054 counting only the distinct ones).

The product of its (nonzero) digits is 11059200, while the sum is 55.

The spelling of 28365685804 in words is "twenty-eight billion, three hundred sixty-five million, six hundred eighty-five thousand, eight hundred four".