28473988818 has 16 divisors (see below), whose sum is σ = 62125066656. Its totient is φ = 8628481440.

The previous prime is 28473988817. The next prime is 28473988819. The reversal of 28473988818 is 81888937482.

It is an interprime number because it is at equal distance from previous prime (28473988817) and next prime (28473988819).

It is a Harshad number since it is a multiple of its sum of digits (66), and also a Moran number because the ratio is a prime number: 431424073 = 28473988818 / (2 + 8 + 4 + 7 + 3 + 9 + 8 + 8 + 8 + 1 + 8).

It is not an unprimeable number, because it can be changed into a prime (28473988813) by changing a digit.

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 7 ways as a sum of consecutive naturals, for example, 215711971 + ... + 215712102.

It is an arithmetic number, because the mean of its divisors is an integer number (3882816666).

Almost surely, 2^28473988818 is an apocalyptic number.

28473988818 is an abundant number, since it is smaller than the sum of its proper divisors (33651077838).

It is a pseudoperfect number, because it is the sum of a subset of its proper divisors.

28473988818 is a wasteful number, since it uses less digits than its factorization.

28473988818 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 431424089.

The product of its digits is 49545216, while the sum is 66.

The spelling of 28473988818 in words is "twenty-eight billion, four hundred seventy-three million, nine hundred eighty-eight thousand, eight hundred eighteen".