28336784 has 40 divisors (see below), whose sum is σ = 63329280. Its totient is φ = 12031488.

The previous prime is 28336753. The next prime is 28336787. The reversal of 28336784 is 48763382.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (28336787) by changing a digit.

It is a polite number, since it can be written in 7 ways as a sum of consecutive naturals, for example, 11537 + ... + 13775.

It is an arithmetic number, because the mean of its divisors is an integer number (1583232).

Almost surely, 2^28336784 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 28336784, and also a Zumkeller number, because its divisors can be partitioned in two sets with the same sum (31664640).

28336784 is an abundant number, since it is smaller than the sum of its proper divisors (34992496).

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

28336784 is a wasteful number, since it uses less digits than its factorization.

28336784 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 2367 (or 2361 counting only the distinct ones).

The product of its digits is 193536, while the sum is 41.

The square root of 28336784 is about 5323.2305980485. The cubic root of 28336784 is about 304.8715180423.

The spelling of 28336784 in words is "twenty-eight million, three hundred thirty-six thousand, seven hundred eighty-four".