28259224 has 32 divisors (see below), whose sum is σ = 62647200. Its totient is φ = 11692800.

The previous prime is 28259221. The next prime is 28259227. The reversal of 28259224 is 42295282.

It is an interprime number because it is at equal distance from previous prime (28259221) and next prime (28259227).

It is a self number, because there is not a number n which added to its sum of digits gives 28259224.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (28259221) by changing a digit.

It is a polite number, since it can be written in 7 ways as a sum of consecutive naturals, for example, 7077 + ... + 10324.

It is an arithmetic number, because the mean of its divisors is an integer number (1957725).

Almost surely, 2^28259224 is an apocalyptic number.

It is an amenable number.

28259224 is an abundant number, since it is smaller than the sum of its proper divisors (34387976).

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

28259224 is a wasteful number, since it uses less digits than its factorization.

28259224 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 17443 (or 17439 counting only the distinct ones).

The product of its digits is 23040, while the sum is 34.

The square root of 28259224 is about 5315.9405564773. The cubic root of 28259224 is about 304.5931114630.

The spelling of 28259224 in words is "twenty-eight million, two hundred fifty-nine thousand, two hundred twenty-four".