28885329 has 40 divisors (see below), whose sum is σ = 49867488. Its totient is φ = 16467840.

The previous prime is 28885313. The next prime is 28885333. The reversal of 28885329 is 92358882.

It is not a de Polignac number, because 28885329 - 2⁴ = 28885313 is a prime.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (28885349) by changing a digit.

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 39 ways as a sum of consecutive naturals, for example, 14194 + ... + 16100.

Almost surely, 2^28885329 is an apocalyptic number.

It is an amenable number.

28885329 is a deficient number, since it is larger than the sum of its proper divisors (20982159).

28885329 is a wasteful number, since it uses less digits than its factorization.

28885329 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 1947 (or 1938 counting only the distinct ones).

The product of its digits is 276480, while the sum is 45.

The square root of 28885329 is about 5374.5073262579. The cubic root of 28885329 is about 306.8261986323.

It can be divided in two parts, 288853 and 29, that added together give a palindrome (288882).

The spelling of 28885329 in words is "twenty-eight million, eight hundred eighty-five thousand, three hundred twenty-nine".