28190224 has 40 divisors (see below), whose sum is σ = 58746240. Its totient is φ = 13062528.

The previous prime is 28190213. The next prime is 28190231. The reversal of 28190224 is 42209182.

It is a junction number, because it is equal to n+sod(n) for n = 28190192 and 28190201.

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, 13302 + ... + 15274.

It is an arithmetic number, because the mean of its divisors is an integer number (1468656).

Almost surely, 2^28190224 is an apocalyptic number.

It is an amenable number.

It is a practical number, because each smaller number is the sum of distinct divisors of 28190224, and also a Zumkeller number, because its divisors can be partitioned in two sets with the same sum (29373120).

28190224 is an abundant number, since it is smaller than the sum of its proper divisors (30556016).

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

28190224 is a wasteful number, since it uses less digits than its factorization.

28190224 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 2047 (or 2041 counting only the distinct ones).

The product of its (nonzero) digits is 2304, while the sum is 28.

The square root of 28190224 is about 5309.4466755021. The cubic root of 28190224 is about 304.3450030522.

The spelling of 28190224 in words is "twenty-eight million, one hundred ninety thousand, two hundred twenty-four".