28085424 has 20 divisors (see below), whose sum is σ = 72554136. Its totient is φ = 9361792.

The previous prime is 28085423. The next prime is 28085429. The reversal of 28085424 is 42458082.

It is a happy number.

It is not an unprimeable number, because it can be changed into a prime (28085423) 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 3 ways as a sum of consecutive naturals, for example, 292509 + ... + 292604.

Almost surely, 2^28085424 is an apocalyptic number.

28085424 is a gapful number since it is divisible by the number (24) formed by its first and last digit.

It is an amenable number.

28085424 is an abundant number, since it is smaller than the sum of its proper divisors (44468712).

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

28085424 is a wasteful number, since it uses less digits than its factorization.

28085424 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 585124 (or 585118 counting only the distinct ones).

The product of its (nonzero) digits is 20480, while the sum is 33.

The square root of 28085424 is about 5299.5682843039. The cubic root of 28085424 is about 303.9673903156.

The spelling of 28085424 in words is "twenty-eight million, eighty-five thousand, four hundred twenty-four".