28680384 has 28 divisors (see below), whose sum is σ = 75884024. Its totient is φ = 9560064.

The previous prime is 28680383. The next prime is 28680389. The reversal of 28680384 is 48308682.

It is not an unprimeable number, because it can be changed into a prime (28680383) 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, 74497 + ... + 74880.

Almost surely, 2^28680384 is an apocalyptic number.

28680384 is a gapful number since it is divisible by the number (24) formed by its first and last digit.

It is an amenable number.

28680384 is an abundant number, since it is smaller than the sum of its proper divisors (47203640).

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

28680384 is a wasteful number, since it uses less digits than its factorization.

28680384 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 149392 (or 149382 counting only the distinct ones).

The product of its (nonzero) digits is 73728, while the sum is 39.

The square root of 28680384 is about 5355.4069873353. The cubic root of 28680384 is about 306.0988189535.

The spelling of 28680384 in words is "twenty-eight million, six hundred eighty thousand, three hundred eighty-four".