28604736 has 84 divisors (see below), whose sum is σ = 83626452. Its totient is φ = 9345024.

The previous prime is 28604729. The next prime is 28604749. The reversal of 28604736 is 63740682.

It can be written as a sum of positive squares in 2 ways, for example, as 9734400 + 18870336 = 3120^2 + 4344^2 .

It is a Harshad number since it is a multiple of its sum of digits (36).

It is a self number, because there is not a number n which added to its sum of digits gives 28604736.

It is a congruent number.

It is an unprimeable number.

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, 30060 + ... + 30996.

It is an arithmetic number, because the mean of its divisors is an integer number (995553).

Almost surely, 2^28604736 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 28604736, and also a Zumkeller number, because its divisors can be partitioned in two sets with the same sum (41813226).

28604736 is an abundant number, since it is smaller than the sum of its proper divisors (55021716).

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

28604736 is a wasteful number, since it uses less digits than its factorization.

28604736 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 1008 (or 995 counting only the distinct ones).

The product of its (nonzero) digits is 48384, while the sum is 36.

The square root of 28604736 is about 5348.3395554134. The cubic root of 28604736 is about 305.8294577058.

The spelling of 28604736 in words is "twenty-eight million, six hundred four thousand, seven hundred thirty-six".