28666824 has 32 divisors (see below), whose sum is σ = 71850240. Its totient is φ = 9531200.

The previous prime is 28666817. The next prime is 28666837. The reversal of 28666824 is 42866682.

It is a nude number because it is divisible by every one of its digits.

It is an unprimeable number.

It is a polite number, since it can be written in 7 ways as a sum of consecutive naturals, for example, 9769 + ... + 12359.

It is an arithmetic number, because the mean of its divisors is an integer number (2245320).

Almost surely, 2^28666824 is an apocalyptic number.

28666824 is a gapful number since it is divisible by the number (24) formed by its first and last digit.

It is an amenable number.

28666824 is an abundant number, since it is smaller than the sum of its proper divisors (43183416).

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

28666824 is a wasteful number, since it uses less digits than its factorization.

28666824 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 3061 (or 3057 counting only the distinct ones).

The product of its digits is 221184, while the sum is 42.

The square root of 28666824 is about 5354.1408274344. The cubic root of 28666824 is about 306.0505704793.

The spelling of 28666824 in words is "twenty-eight million, six hundred sixty-six thousand, eight hundred twenty-four".