28335564 has 18 divisors (see below), whose sum is σ = 71626100. Its totient is φ = 9445176.

The previous prime is 28335539. The next prime is 28335569. The reversal of 28335564 is 46553382.

It is a happy number.

It is a tau number, because it is divible by the number of its divisors (18).

It is a Harshad number since it is a multiple of its sum of digits (36), and also a Moran number because the ratio is a prime number: 787099 = 28335564 / (2 + 8 + 3 + 3 + 5 + 5 + 6 + 4).

It is not an unprimeable number, because it can be changed into a prime (28335569) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (13) of ones.

It is a polite number, since it can be written in 5 ways as a sum of consecutive naturals, for example, 393514 + ... + 393585.

Almost surely, 2^28335564 is an apocalyptic number.

It is an amenable number.

28335564 is an abundant number, since it is smaller than the sum of its proper divisors (43290536).

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

28335564 is a wasteful number, since it uses less digits than its factorization.

28335564 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 787109 (or 787104 counting only the distinct ones).

The product of its digits is 86400, while the sum is 36.

The square root of 28335564 is about 5323.1160047476. The cubic root of 28335564 is about 304.8671427094.

The spelling of 28335564 in words is "twenty-eight million, three hundred thirty-five thousand, five hundred sixty-four".