28645308 has 18 divisors (see below), whose sum is σ = 72409064. Its totient is φ = 9548424.

The previous prime is 28645307. The next prime is 28645319. The reversal of 28645308 is 80354682.

28645308 is a `hidden beast` number, since 2 + 8 + 645 + 3 + 0 + 8 = 666.

It is a tau number, because it is divible by the number of its divisors (18).

It is a hoax number, since the sum of its digits (36) coincides with the sum of the digits of its distinct prime factors.

It is a Harshad number since it is a multiple of its sum of digits (36), and also a Moran number because the ratio is a prime number: 795703 = 28645308 / (2 + 8 + 6 + 4 + 5 + 3 + 0 + 8).

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (28645303) by changing a digit.

It is a polite number, since it can be written in 5 ways as a sum of consecutive naturals, for example, 397816 + ... + 397887.

Almost surely, 2^28645308 is an apocalyptic number.

It is an amenable number.

28645308 is an abundant number, since it is smaller than the sum of its proper divisors (43763756).

It is a pseudoperfect number, because it is the sum of a subset of its proper divisors.

28645308 is a wasteful number, since it uses less digits than its factorization.

28645308 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 795713 (or 795708 counting only the distinct ones).

The product of its (nonzero) digits is 46080, while the sum is 36.

The square root of 28645308 is about 5352.1311643120. The cubic root of 28645308 is about 305.9739821529.

The spelling of 28645308 in words is "twenty-eight million, six hundred forty-five thousand, three hundred eight".