28066272 has 96 divisors (see below), whose sum is σ = 81341568. Its totient is φ = 8418816.

The previous prime is 28066267. The next prime is 28066273. The reversal of 28066272 is 27266082.

It is a tau number, because it is divible by the number of its divisors (96).

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (28066273) by changing a digit.

It is a polite number, since it can be written in 15 ways as a sum of consecutive naturals, for example, 53403 + ... + 53925.

It is an arithmetic number, because the mean of its divisors is an integer number (847308).

Almost surely, 2^28066272 is an apocalyptic number.

It is an amenable number.

It is a practical number, because each smaller number is the sum of distinct divisors of 28066272, and also a Zumkeller number, because its divisors can be partitioned in two sets with the same sum (40670784).

28066272 is an abundant number, since it is smaller than the sum of its proper divisors (53275296).

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

28066272 is a wasteful number, since it uses less digits than its factorization.

28066272 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 592 (or 584 counting only the distinct ones).

The product of its (nonzero) digits is 16128, while the sum is 33.

The square root of 28066272 is about 5297.7610365134. The cubic root of 28066272 is about 303.8982808344.

The spelling of 28066272 in words is "twenty-eight million, sixty-six thousand, two hundred seventy-two".