28228604 has 24 divisors (see below), whose sum is σ = 52861200. Its totient is φ = 13150080.

The previous prime is 28228573. The next prime is 28228621. The reversal of 28228604 is 40682282.

It is a happy number.

It is a congruent number.

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, 1592 + ... + 7680.

It is an arithmetic number, because the mean of its divisors is an integer number (2202550).

Almost surely, 2^28228604 is an apocalyptic number.

It is an amenable number.

28228604 is a deficient number, since it is larger than the sum of its proper divisors (24632596).

28228604 is a wasteful number, since it uses less digits than its factorization.

28228604 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 6173 (or 6171 counting only the distinct ones).

The product of its (nonzero) digits is 12288, while the sum is 32.

The square root of 28228604 is about 5313.0597587454. The cubic root of 28228604 is about 304.4830587631.

The spelling of 28228604 in words is "twenty-eight million, two hundred twenty-eight thousand, six hundred four".