28664308 has 12 divisors (see below), whose sum is σ = 51109380. Its totient is φ = 14061632.

The previous prime is 28664303. The next prime is 28664309. The reversal of 28664308 is 80346682.

It can be written as a sum of positive squares in 2 ways, for example, as 14915044 + 13749264 = 3862^2 + 3708^2 .

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (28664303) by changing a digit.

It is a polite number, since it can be written in 3 ways as a sum of consecutive naturals, for example, 67393 + ... + 67816.

It is an arithmetic number, because the mean of its divisors is an integer number (4259115).

Almost surely, 2^28664308 is an apocalyptic number.

It is an amenable number.

28664308 is a deficient number, since it is larger than the sum of its proper divisors (22445072).

28664308 is a wasteful number, since it uses less digits than its factorization.

28664308 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 135266 (or 135264 counting only the distinct ones).

The product of its (nonzero) digits is 55296, while the sum is 37.

The square root of 28664308 is about 5353.9058639464. The cubic root of 28664308 is about 306.0416165079.

The spelling of 28664308 in words is "twenty-eight million, six hundred sixty-four thousand, three hundred eight".