28089544 has 48 divisors (see below), whose sum is σ = 61847280. Its totient is φ = 11924640.

The previous prime is 28089539. The next prime is 28089547. The reversal of 28089544 is 44598082.

It is a junction number, because it is equal to n+sod(n) for n = 28089497 and 28089506.

It is not an unprimeable number, because it can be changed into a prime (28089547) by changing a digit.

It is a polite number, since it can be written in 11 ways as a sum of consecutive naturals, for example, 51079 + ... + 51625.

It is an arithmetic number, because the mean of its divisors is an integer number (1288485).

Almost surely, 2^28089544 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 28089544, and also a Zumkeller number, because its divisors can be partitioned in two sets with the same sum (30923640).

28089544 is an abundant number, since it is smaller than the sum of its proper divisors (33757736).

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

28089544 is a wasteful number, since it uses less digits than its factorization.

28089544 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 698 (or 687 counting only the distinct ones).

The product of its (nonzero) digits is 92160, while the sum is 40.

The square root of 28089544 is about 5299.9569809575. The cubic root of 28089544 is about 303.9822531191.

The spelling of 28089544 in words is "twenty-eight million, eighty-nine thousand, five hundred forty-four".