28226880028 has 12 divisors (see below), whose sum is σ = 49400829072. Its totient is φ = 14112357440.

The previous prime is 28226879999. The next prime is 28226880029. The reversal of 28226880028 is 82008862282.

It is a super-2 number, since 2×28226880028² (a number of 22 digits) contains 22 as substring.

It is a self number, because there is not a number n which added to its sum of digits gives 28226880028.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (28226880029) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (13) of ones.

It is a polite number, since it can be written in 3 ways as a sum of consecutive naturals, for example, 210493 + ... + 317428.

It is an arithmetic number, because the mean of its divisors is an integer number (4116735756).

Almost surely, 2^28226880028 is an apocalyptic number.

It is an amenable number.

28226880028 is a deficient number, since it is larger than the sum of its proper divisors (21173949044).

28226880028 is a wasteful number, since it uses less digits than its factorization.

28226880028 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 541292 (or 541290 counting only the distinct ones).

The product of its (nonzero) digits is 393216, while the sum is 46.

The spelling of 28226880028 in words is "twenty-eight billion, two hundred twenty-six million, eight hundred eighty thousand, twenty-eight".