28117224 has 48 divisors (see below), whose sum is σ = 79466400. Its totient is φ = 8964384.

The previous prime is 28117213. The next prime is 28117231. The reversal of 28117224 is 42271182.

It is an unprimeable number.

It is a pernicious number, because its binary representation contains a prime number (11) of ones.

It is a polite number, since it can be written in 11 ways as a sum of consecutive naturals, for example, 6834 + ... + 10145.

It is an arithmetic number, because the mean of its divisors is an integer number (1655550).

Almost surely, 2^28117224 is an apocalyptic number.

28117224 is a gapful number since it is divisible by the number (24) formed by its first and last digit.

It is an amenable number.

28117224 is an abundant number, since it is smaller than the sum of its proper divisors (51349176).

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

28117224 is a wasteful number, since it uses less digits than its factorization.

28117224 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 17014 (or 17007 counting only the distinct ones).

The product of its digits is 1792, while the sum is 27.

The square root of 28117224 is about 5302.5676799075. The cubic root of 28117224 is about 304.0820704085.

The spelling of 28117224 in words is "twenty-eight million, one hundred seventeen thousand, two hundred twenty-four".