28084550 has 24 divisors (see below), whose sum is σ = 56256816. Its totient is φ = 10369440.

The previous prime is 28084523. The next prime is 28084559. The reversal of 28084550 is 5548082.

It is a Smith number, since the sum of its digits (32) coincides with the sum of the digits of its prime factors.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (28084559) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (11) of ones.

It is a polite number, since it can be written in 11 ways as a sum of consecutive naturals, for example, 20954 + ... + 22253.

It is an arithmetic number, because the mean of its divisors is an integer number (2344034).

Almost surely, 2^28084550 is an apocalyptic number.

28084550 is an abundant number, since it is smaller than the sum of its proper divisors (28172266).

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

28084550 is a wasteful number, since it uses less digits than its factorization.

28084550 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 43232 (or 43227 counting only the distinct ones).

The product of its (nonzero) digits is 12800, while the sum is 32.

The square root of 28084550 is about 5299.4858241154. The cubic root of 28084550 is about 303.9642371942.

The spelling of 28084550 in words is "twenty-eight million, eighty-four thousand, five hundred fifty".