28084500 has 108 divisors (see below), whose sum is σ = 89732916. Its totient is φ = 7394400.

The previous prime is 28084477. The next prime is 28084523. The reversal of 28084500 is 548082.

It is a powerful number, because all its prime factors have an exponent greater than 1 and also an Achilles number because it is not a perfect power.

28084500 is a `hidden beast` number, since 2 + 80 + 84 + 500 = 666.

It is an interprime number because it is at equal distance from previous prime (28084477) and next prime (28084523).

It can be written as a sum of positive squares in 2 ways, for example, as 898704 + 27185796 = 948^2 + 5214^2 .

It is a congruent number.

It is an unprimeable number.

It is a polite number, since it can be written in 35 ways as a sum of consecutive naturals, for example, 355461 + ... + 355539.

Almost surely, 2^28084500 is an apocalyptic number.

28084500 is a gapful number since it is divisible by the number (20) formed by its first and last digit.

It is an amenable number.

It is a practical number, because each smaller number is the sum of distinct divisors of 28084500, and also a Zumkeller number, because its divisors can be partitioned in two sets with the same sum (44866458).

28084500 is an abundant number, since it is smaller than the sum of its proper divisors (61648416).

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

28084500 is a wasteful number, since it uses less digits than its factorization.

28084500 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 183 (or 89 counting only the distinct ones).

The product of its (nonzero) digits is 2560, while the sum is 27.

The square root of 28084500 is about 5299.4811066745. The cubic root of 28084500 is about 303.9640568077.

The spelling of 28084500 in words is "twenty-eight million, eighty-four thousand, five hundred".