28835389 has 12 divisors (see below), whose sum is σ = 31907232. Its totient is φ = 26038760.

The previous prime is 28835357. The next prime is 28835431. The reversal of 28835389 is 98353882.

It is a happy number.

It is not a de Polignac number, because 28835389 - 2⁵ = 28835357 is a prime.

It is a Duffinian number.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (28835489) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (19) of ones.

It is a polite number, since it can be written in 11 ways as a sum of consecutive naturals, for example, 19494 + ... + 20920.

It is an arithmetic number, because the mean of its divisors is an integer number (2658936).

Almost surely, 2^28835389 is an apocalyptic number.

It is an amenable number.

28835389 is a deficient number, since it is larger than the sum of its proper divisors (3071843).

28835389 is a wasteful number, since it uses less digits than its factorization.

28835389 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 1616 (or 1605 counting only the distinct ones).

The product of its digits is 414720, while the sum is 46.

The square root of 28835389 is about 5369.8593091440. The cubic root of 28835389 is about 306.6492721440.

The spelling of 28835389 in words is "twenty-eight million, eight hundred thirty-five thousand, three hundred eighty-nine".