28549884 has 48 divisors (see below), whose sum is σ = 75027456. Its totient is φ = 8371200.

The previous prime is 28549883. The next prime is 28549897. The reversal of 28549884 is 48894582.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (28549883) 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, 604 + ... + 7580.

It is an arithmetic number, because the mean of its divisors is an integer number (1563072).

Almost surely, 2^28549884 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 28549884, and also a Zumkeller number, because its divisors can be partitioned in two sets with the same sum (37513728).

28549884 is an abundant number, since it is smaller than the sum of its proper divisors (46477572).

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

28549884 is a wasteful number, since it uses less digits than its factorization.

28549884 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 7026 (or 7024 counting only the distinct ones).

The product of its digits is 737280, while the sum is 48.

The square root of 28549884 is about 5343.2091480682. The cubic root of 28549884 is about 305.6338480048.

It can be divided in two parts, 285498 and 84, that added together give a palindrome (285582).

The spelling of 28549884 in words is "twenty-eight million, five hundred forty-nine thousand, eight hundred eighty-four".