28022748 has 24 divisors (see below), whose sum is σ = 70416528. Its totient is φ = 8622336.

The previous prime is 28022747. The next prime is 28022759. The reversal of 28022748 is 84722082.

It is a super-3 number, since 3×28022748³ (a number of 23 digits) contains 333 as substring.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (28022741) by changing a digit.

It is a polite number, since it can be written in 7 ways as a sum of consecutive naturals, for example, 89661 + ... + 89972.

It is an arithmetic number, because the mean of its divisors is an integer number (2934022).

Almost surely, 2^28022748 is an apocalyptic number.

It is an amenable number.

28022748 is an abundant number, since it is smaller than the sum of its proper divisors (42393780).

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

28022748 is a wasteful number, since it uses less digits than its factorization.

28022748 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 179653 (or 179651 counting only the distinct ones).

The product of its (nonzero) digits is 14336, while the sum is 33.

The square root of 28022748 is about 5293.6516696889. The cubic root of 28022748 is about 303.7411086493.

The spelling of 28022748 in words is "twenty-eight million, twenty-two thousand, seven hundred forty-eight".