28022636 has 12 divisors (see below), whose sum is σ = 50621760. Its totient is φ = 13559280.

The previous prime is 28022623. The next prime is 28022651. The reversal of 28022636 is 63622082.

It is a junction number, because it is equal to n+sod(n) for n = 28022599 and 28022608.

It is an unprimeable number.

It is a polite number, since it can be written in 3 ways as a sum of consecutive naturals, for example, 112871 + ... + 113118.

It is an arithmetic number, because the mean of its divisors is an integer number (4218480).

Almost surely, 2^28022636 is an apocalyptic number.

It is an amenable number.

28022636 is a deficient number, since it is larger than the sum of its proper divisors (22599124).

28022636 is a wasteful number, since it uses less digits than its factorization.

28022636 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 226024 (or 226022 counting only the distinct ones).

The product of its (nonzero) digits is 6912, while the sum is 29.

The square root of 28022636 is about 5293.6410909694. The cubic root of 28022636 is about 303.7407039894.

The spelling of 28022636 in words is "twenty-eight million, twenty-two thousand, six hundred thirty-six".