28118220299 has 4 divisors (see below), whose sum is σ = 30281160336. Its totient is φ = 25955280264.

The previous prime is 28118220271. The next prime is 28118220349. The reversal of 28118220299 is 99202281182.

It is a semiprime because it is the product of two primes.

It is a cyclic number.

It is not a de Polignac number, because 28118220299 - 2⁸ = 28118220043 is a prime.

It is a Duffinian number.

It is not an unprimeable number, because it can be changed into a prime (28118220239) by changing a digit.

It is a polite number, since it can be written in 3 ways as a sum of consecutive naturals, for example, 1081469999 + ... + 1081470024.

It is an arithmetic number, because the mean of its divisors is an integer number (7570290084).

Almost surely, 2^28118220299 is an apocalyptic number.

28118220299 is a deficient number, since it is larger than the sum of its proper divisors (2162940037).

28118220299 is a wasteful number, since it uses less digits than its factorization.

28118220299 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 2162940036.

The product of its (nonzero) digits is 82944, while the sum is 44.

The spelling of 28118220299 in words is "twenty-eight billion, one hundred eighteen million, two hundred twenty thousand, two hundred ninety-nine".