28809322 has 16 divisors (see below), whose sum is σ = 46189440. Its totient is φ = 13428928.

The previous prime is 28809311. The next prime is 28809349. The reversal of 28809322 is 22390882.

It is a happy number.

It is a Harshad number since it is a multiple of its sum of digits (34).

It is an unprimeable number.

It is a polite number, since it can be written in 7 ways as a sum of consecutive naturals, for example, 322 + ... + 7597.

It is an arithmetic number, because the mean of its divisors is an integer number (2886840).

Almost surely, 2^28809322 is an apocalyptic number.

28809322 is a deficient number, since it is larger than the sum of its proper divisors (17380118).

28809322 is a wasteful number, since it uses less digits than its factorization.

28809322 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 8045.

The product of its (nonzero) digits is 13824, while the sum is 34.

The square root of 28809322 is about 5367.4316017999. The cubic root of 28809322 is about 306.5568413182.

The spelling of 28809322 in words is "twenty-eight million, eight hundred nine thousand, three hundred twenty-two".