28305208 has 8 divisors (see below), whose sum is σ = 53072280. Its totient is φ = 14152600.

The previous prime is 28305197. The next prime is 28305217. The reversal of 28305208 is 80250382.

It is a tau number, because it is divible by the number of its divisors (8).

It is a hoax number, since the sum of its digits (28) coincides with the sum of the digits of its distinct prime factors.

It is a congruent number.

It is an unprimeable number.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 1769068 + ... + 1769083.

It is an arithmetic number, because the mean of its divisors is an integer number (6634035).

Almost surely, 2^28305208 is an apocalyptic number.

It is an amenable number.

28305208 is a deficient number, since it is larger than the sum of its proper divisors (24767072).

28305208 is a wasteful number, since it uses less digits than its factorization.

28305208 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 3538157 (or 3538153 counting only the distinct ones).

The product of its (nonzero) digits is 3840, while the sum is 28.

The square root of 28305208 is about 5320.2639032289. The cubic root of 28305208 is about 304.7582353570.

The spelling of 28305208 in words is "twenty-eight million, three hundred five thousand, two hundred eight".