28023224 has 16 divisors (see below), whose sum is σ = 52609920. Its totient is φ = 13993920.

The previous prime is 28023221. The next prime is 28023241. The reversal of 28023224 is 42232082.

It is a self number, because there is not a number n which added to its sum of digits gives 28023224.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (28023221) 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, 6569 + ... + 9959.

It is an arithmetic number, because the mean of its divisors is an integer number (3288120).

Almost surely, 2^28023224 is an apocalyptic number.

It is an amenable number.

28023224 is a deficient number, since it is larger than the sum of its proper divisors (24586696).

28023224 is a wasteful number, since it uses less digits than its factorization.

28023224 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 4430 (or 4426 counting only the distinct ones).

The product of its (nonzero) digits is 1536, while the sum is 23.

The square root of 28023224 is about 5293.6966290108. The cubic root of 28023224 is about 303.7428284419.

The spelling of 28023224 in words is "twenty-eight million, twenty-three thousand, two hundred twenty-four".