28338872665 has 8 divisors (see below), whose sum is σ = 34019170560. Its totient is φ = 22662749232.

The previous prime is 28338872657. The next prime is 28338872669. The reversal of 28338872665 is 56627883382.

It is a sphenic number, since it is the product of 3 distinct primes.

It is a cyclic number.

It is not a de Polignac number, because 28338872665 - 2³ = 28338872657 is a prime.

It is not an unprimeable number, because it can be changed into a prime (28338872669) by changing a digit.

It is a polite number, since it can be written in 7 ways as a sum of consecutive naturals, for example, 1028659 + ... + 1055848.

It is an arithmetic number, because the mean of its divisors is an integer number (4252396320).

Almost surely, 2^28338872665 is an apocalyptic number.

It is an amenable number.

28338872665 is a deficient number, since it is larger than the sum of its proper divisors (5680297895).

28338872665 is a wasteful number, since it uses less digits than its factorization.

28338872665 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 2087231.

The product of its digits is 23224320, while the sum is 58.

The spelling of 28338872665 in words is "twenty-eight billion, three hundred thirty-eight million, eight hundred seventy-two thousand, six hundred sixty-five".