28022028 has 24 divisors (see below), whose sum is σ = 65547888. Its totient is φ = 9317376.

The previous prime is 28022009. The next prime is 28022041. The reversal of 28022028 is 82022082.

It is a junction number, because it is equal to n+sod(n) for n = 28021989 and 28022007.

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, 2500 + ... + 7892.

It is an arithmetic number, because the mean of its divisors is an integer number (2731162).

Almost surely, 2^28022028 is an apocalyptic number.

It is an amenable number.

28022028 is an abundant number, since it is smaller than the sum of its proper divisors (37525860).

It is a pseudoperfect number, because it is the sum of a subset of its proper divisors.

28022028 is a wasteful number, since it uses less digits than its factorization.

28022028 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 5833 (or 5831 counting only the distinct ones).

The product of its (nonzero) digits is 1024, while the sum is 24.

The square root of 28022028 is about 5293.5836632663. The cubic root of 28022028 is about 303.7385072452.

The spelling of 28022028 in words is "twenty-eight million, twenty-two thousand, twenty-eight".