28388690165 has 8 divisors (see below), whose sum is σ = 37163376288. Its totient is φ = 20646320080.

The previous prime is 28388690137. The next prime is 28388690177. The reversal of 28388690165 is 56109688382.

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

It is not a de Polignac number, because 28388690165 - 2¹⁰ = 28388689141 is a prime.

It is a Duffinian number.

It is a self number, because there is not a number n which added to its sum of digits gives 28388690165.

It is a congruent number.

It is an unprimeable number.

It is a polite number, since it can be written in 7 ways as a sum of consecutive naturals, for example, 258078947 + ... + 258079056.

It is an arithmetic number, because the mean of its divisors is an integer number (4645422036).

Almost surely, 2^28388690165 is an apocalyptic number.

It is an amenable number.

28388690165 is a deficient number, since it is larger than the sum of its proper divisors (8774686123).

28388690165 is a wasteful number, since it uses less digits than its factorization.

28388690165 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 516158019.

The product of its (nonzero) digits is 4976640, while the sum is 56.

The spelling of 28388690165 in words is "twenty-eight billion, three hundred eighty-eight million, six hundred ninety thousand, one hundred sixty-five".