28665304 has 16 divisors (see below), whose sum is σ = 53985600. Its totient is φ = 14269152.

The previous prime is 28665293. The next prime is 28665313. The reversal of 28665304 is 40356682.

It is a happy number.

It is a self number, because there is not a number n which added to its sum of digits gives 28665304.

It is a congruent number.

It is an unprimeable number.

It is a polite number, since it can be written in 3 ways as a sum of consecutive naturals, for example, 5992 + ... + 9655.

It is an arithmetic number, because the mean of its divisors is an integer number (3374100).

Almost surely, 2^28665304 is an apocalyptic number.

It is an amenable number.

28665304 is a deficient number, since it is larger than the sum of its proper divisors (25320296).

28665304 is a wasteful number, since it uses less digits than its factorization.

28665304 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 15882 (or 15878 counting only the distinct ones).

The product of its (nonzero) digits is 34560, while the sum is 34.

The square root of 28665304 is about 5353.9988793424. The cubic root of 28665304 is about 306.0451611475.

The spelling of 28665304 in words is "twenty-eight million, six hundred sixty-five thousand, three hundred four".