28224786 has 16 divisors (see below), whose sum is σ = 56595168. Its totient is φ = 9384000.

The previous prime is 28224773. The next prime is 28224809. The reversal of 28224786 is 68742282.

It is an unprimeable number.

It is a pernicious number, because its binary representation contains a prime number (13) of ones.

It is a polite number, since it can be written in 7 ways as a sum of consecutive naturals, for example, 3460 + ... + 8271.

It is an arithmetic number, because the mean of its divisors is an integer number (3537198).

Almost surely, 2^28224786 is an apocalyptic number.

28224786 is an abundant number, since it is smaller than the sum of its proper divisors (28370382).

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

28224786 is a wasteful number, since it uses less digits than its factorization.

28224786 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 12137.

The product of its digits is 86016, while the sum is 39.

The square root of 28224786 is about 5312.7004432774. The cubic root of 28224786 is about 304.4693307405.

The spelling of 28224786 in words is "twenty-eight million, two hundred twenty-four thousand, seven hundred eighty-six".