28885910223 has 4 divisors (see below), whose sum is σ = 38514546968. Its totient is φ = 19257273480.

The previous prime is 28885910203. The next prime is 28885910227. The reversal of 28885910223 is 32201958882.

It is a happy number.

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

It is not a de Polignac number, because 28885910223 - 2²⁰ = 28884861647 is a prime.

It is a super-2 number, since 2×28885910223² (a number of 22 digits) contains 22 as substring.

It is a Duffinian number.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (28885910227) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (19) of ones.

It is a polite number, since it can be written in 3 ways as a sum of consecutive naturals, for example, 4814318368 + ... + 4814318373.

It is an arithmetic number, because the mean of its divisors is an integer number (9628636742).

Almost surely, 2^28885910223 is an apocalyptic number.

28885910223 is a deficient number, since it is larger than the sum of its proper divisors (9628636745).

28885910223 is an equidigital number, since it uses as much as digits as its factorization.

28885910223 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 9628636744.

The product of its (nonzero) digits is 552960, while the sum is 48.

The spelling of 28885910223 in words is "twenty-eight billion, eight hundred eighty-five million, nine hundred ten thousand, two hundred twenty-three".