28826784 has 144 divisors (see below), whose sum is σ = 95397120. Its totient is φ = 8087040.

The previous prime is 28826779. The next prime is 28826801. The reversal of 28826784 is 48762882.

It is a happy number.

It is a tau number, because it is divible by the number of its divisors (144).

It is a nude number because it is divisible by every one of its digits.

It is an unprimeable number.

It is a polite number, since it can be written in 23 ways as a sum of consecutive naturals, for example, 159174 + ... + 159354.

It is an arithmetic number, because the mean of its divisors is an integer number (662480).

Almost surely, 2^28826784 is an apocalyptic number.

28826784 is a gapful number since it is divisible by the number (24) formed by its first and last digit.

It is an amenable number.

It is a practical number, because each smaller number is the sum of distinct divisors of 28826784, and also a Zumkeller number, because its divisors can be partitioned in two sets with the same sum (47698560).

28826784 is an abundant number, since it is smaller than the sum of its proper divisors (66570336).

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

28826784 is a wasteful number, since it uses less digits than its factorization.

28826784 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 283 (or 272 counting only the distinct ones).

The product of its digits is 344064, while the sum is 45.

The square root of 28826784 is about 5369.0580179395. The cubic root of 28826784 is about 306.6187658853.

It can be divided in two parts, 288 and 26784, that added together give a palindrome (27072).

The spelling of 28826784 in words is "twenty-eight million, eight hundred twenty-six thousand, seven hundred eighty-four".