28108120228 has 24 divisors (see below), whose sum is σ = 50458472064. Its totient is φ = 13692360000.

The previous prime is 28108120219. The next prime is 28108120273. The reversal of 28108120228 is 82202180182.

It is a junction number, because it is equal to n+sod(n) for n = 28108120193 and 28108120202.

It is an unprimeable number.

It is a polite number, since it can be written in 7 ways as a sum of consecutive naturals, for example, 1353 + ... + 237103.

It is an arithmetic number, because the mean of its divisors is an integer number (2102436336).

Almost surely, 2^28108120228 is an apocalyptic number.

It is an amenable number.

28108120228 is a deficient number, since it is larger than the sum of its proper divisors (22350351836).

28108120228 is a wasteful number, since it uses less digits than its factorization.

28108120228 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 236523 (or 236521 counting only the distinct ones).

The product of its (nonzero) digits is 8192, while the sum is 34.

The spelling of 28108120228 in words is "twenty-eight billion, one hundred eight million, one hundred twenty thousand, two hundred twenty-eight".