28385712 has 30 divisors (see below), whose sum is σ = 79440972. Its totient is φ = 9461856.

The previous prime is 28385711. The next prime is 28385717. The reversal of 28385712 is 21758382.

28385712 is a `hidden beast` number, since 2 + 83 + 8 + 571 + 2 = 666.

It is a Harshad number since it is a multiple of its sum of digits (36).

It is not an unprimeable number, because it can be changed into a prime (28385711) 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, 98418 + ... + 98705.

Almost surely, 2^28385712 is an apocalyptic number.

It is an amenable number.

28385712 is an abundant number, since it is smaller than the sum of its proper divisors (51055260).

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

28385712 is a wasteful number, since it uses less digits than its factorization.

28385712 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 197137 (or 197128 counting only the distinct ones).

The product of its digits is 26880, while the sum is 36.

The square root of 28385712 is about 5327.8243214280. The cubic root of 28385712 is about 305.0468869959.

The spelling of 28385712 in words is "twenty-eight million, three hundred eighty-five thousand, seven hundred twelve".