28684812 has 24 divisors (see below), whose sum is σ = 72080176. Its totient is φ = 8826048.

The previous prime is 28684811. The next prime is 28684829. The reversal of 28684812 is 21848682.

It is a Harshad number since it is a multiple of its sum of digits (39).

It is not an unprimeable number, because it can be changed into a prime (28684811) by changing a digit.

It is a polite number, since it can be written in 7 ways as a sum of consecutive naturals, for example, 91783 + ... + 92094.

Almost surely, 2^28684812 is an apocalyptic number.

It is an amenable number.

28684812 is an abundant number, since it is smaller than the sum of its proper divisors (43395364).

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

28684812 is a wasteful number, since it uses less digits than its factorization.

28684812 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 183897 (or 183895 counting only the distinct ones).

The product of its digits is 49152, while the sum is 39.

The square root of 28684812 is about 5355.8203853378. The cubic root of 28684812 is about 306.1145711348.

The spelling of 28684812 in words is "twenty-eight million, six hundred eighty-four thousand, eight hundred twelve".