28026228 has 12 divisors (see below), whose sum is σ = 65394560. Its totient is φ = 9342072.

The previous prime is 28026223. The next prime is 28026253. The reversal of 28026228 is 82262082.

It is a tau number, because it is divible by the number of its divisors (12).

It is a junction number, because it is equal to n+sod(n) for n = 28026195 and 28026204.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (28026223) by changing a digit.

It is a polite number, since it can be written in 3 ways as a sum of consecutive naturals, for example, 1167748 + ... + 1167771.

Almost surely, 2^28026228 is an apocalyptic number.

It is an amenable number.

28026228 is an abundant number, since it is smaller than the sum of its proper divisors (37368332).

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

28026228 is a wasteful number, since it uses less digits than its factorization.

28026228 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 2335526 (or 2335524 counting only the distinct ones).

The product of its (nonzero) digits is 6144, while the sum is 30.

The square root of 28026228 is about 5293.9803550826. The cubic root of 28026228 is about 303.7536814741.

The spelling of 28026228 in words is "twenty-eight million, twenty-six thousand, two hundred twenty-eight".