28084272 has 80 divisors (see below), whose sum is σ = 77709312. Its totient is φ = 8709120.

The previous prime is 28084271. The next prime is 28084283. The reversal of 28084272 is 27248082.

It is a hoax number, since the sum of its digits (33) coincides with the sum of the digits of its distinct prime factors.

It is not an unprimeable number, because it can be changed into a prime (28084271) 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, 103497 + ... + 103767.

Almost surely, 2^28084272 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 28084272, and also a Zumkeller number, because its divisors can be partitioned in two sets with the same sum (38854656).

28084272 is an abundant number, since it is smaller than the sum of its proper divisors (49625040).

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

28084272 is a wasteful number, since it uses less digits than its factorization.

28084272 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 426 (or 420 counting only the distinct ones).

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

The square root of 28084272 is about 5299.4595950908. The cubic root of 28084272 is about 303.9632342426.

The spelling of 28084272 in words is "twenty-eight million, eighty-four thousand, two hundred seventy-two".