28022268 has 24 divisors (see below), whose sum is σ = 65635920. Its totient is φ = 9304960.

The previous prime is 28022251. The next prime is 28022287. The reversal of 28022268 is 86222082.

It is a congruent number.

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, 1113 + ... + 7568.

It is an arithmetic number, because the mean of its divisors is an integer number (2734830).

Almost surely, 2^28022268 is an apocalyptic number.

It is an amenable number.

28022268 is an abundant number, since it is smaller than the sum of its proper divisors (37613652).

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

28022268 is a wasteful number, since it uses less digits than its factorization.

28022268 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 8957 (or 8955 counting only the distinct ones).

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

The square root of 28022268 is about 5293.6063321709. The cubic root of 28022268 is about 303.7393743849.

The spelling of 28022268 in words is "twenty-eight million, twenty-two thousand, two hundred sixty-eight".