28824439 has 4 divisors (see below), whose sum is σ = 32942224. Its totient is φ = 24706656.

The previous prime is 28824437. The next prime is 28824457. The reversal of 28824439 is 93442882.

It is a semiprime because it is the product of two primes.

It is a cyclic number.

It is not a de Polignac number, because 28824439 - 2¹ = 28824437 is a prime.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (28824437) by changing a digit.

It is a polite number, since it can be written in 3 ways as a sum of consecutive naturals, for example, 2058882 + ... + 2058895.

It is an arithmetic number, because the mean of its divisors is an integer number (8235556).

Almost surely, 2^28824439 is an apocalyptic number.

28824439 is a deficient number, since it is larger than the sum of its proper divisors (4117785).

28824439 is an equidigital number, since it uses as much as digits as its factorization.

28824439 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 4117784.

The product of its digits is 110592, while the sum is 40.

The square root of 28824439 is about 5368.8396325463. The cubic root of 28824439 is about 306.6104513897.

The spelling of 28824439 in words is "twenty-eight million, eight hundred twenty-four thousand, four hundred thirty-nine".