28120022 has 24 divisors (see below), whose sum is σ = 50215176. Its totient is φ = 11769408.

The previous prime is 28120021. The next prime is 28120033. The reversal of 28120022 is 22002182.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (28120021) by changing a digit.

It is a polite number, since it can be written in 11 ways as a sum of consecutive naturals, for example, 878 + ... + 7550.

It is an arithmetic number, because the mean of its divisors is an integer number (2092299).

Almost surely, 2^28120022 is an apocalyptic number.

28120022 is a deficient number, since it is larger than the sum of its proper divisors (22095154).

28120022 is a wasteful number, since it uses less digits than its factorization.

28120022 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 6732 (or 6725 counting only the distinct ones).

The product of its (nonzero) digits is 128, while the sum is 17.

The square root of 28120022 is about 5302.8315077890. The cubic root of 28120022 is about 304.0921566747.

The spelling of 28120022 in words is "twenty-eight million, one hundred twenty thousand, twenty-two".