28815226799 has 4 divisors (see below), whose sum is σ = 28848084264. Its totient is φ = 28782369336.

The previous prime is 28815226789. The next prime is 28815226801. The reversal of 28815226799 is 99762251882.

It is a semiprime because it is the product of two primes, and also an emirpimes, since its reverse is a distinct semiprime: 99762251882 = 2 ⋅49881125941.

It is a cyclic number.

It is not a de Polignac number, because 28815226799 - 2²⁰ = 28814178223 is a prime.

It is a Duffinian number.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (28815226789) 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, 16427417 + ... + 16429170.

It is an arithmetic number, because the mean of its divisors is an integer number (7212021066).

Almost surely, 2^28815226799 is an apocalyptic number.

28815226799 is a deficient number, since it is larger than the sum of its proper divisors (32857465).

28815226799 is an equidigital number, since it uses as much as digits as its factorization.

28815226799 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 32857464.

The product of its digits is 8709120, while the sum is 59.

The spelling of 28815226799 in words is "twenty-eight billion, eight hundred fifteen million, two hundred twenty-six thousand, seven hundred ninety-nine".