28330224 has 80 divisors (see below), whose sum is σ = 79911552. Its totient is φ = 8596224.

The previous prime is 28330223. The next prime is 28330229. The reversal of 28330224 is 42203382.

It is a Harshad number since it is a multiple of its sum of digits (24).

It is a junction number, because it is equal to n+sod(n) for n = 28330194 and 28330203.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (28330223) by changing a digit.

It is a polite number, since it can be written in 15 ways as a sum of consecutive naturals, for example, 51519 + ... + 52065.

Almost surely, 2^28330224 is an apocalyptic number.

28330224 is a gapful number since it is divisible by the number (24) formed by its first and last digit.

It is an amenable number.

It is a practical number, because each smaller number is the sum of distinct divisors of 28330224, and also a Zumkeller number, because its divisors can be partitioned in two sets with the same sum (39955776).

28330224 is an abundant number, since it is smaller than the sum of its proper divisors (51581328).

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

28330224 is a wasteful number, since it uses less digits than its factorization.

28330224 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 654 (or 648 counting only the distinct ones).

The product of its (nonzero) digits is 2304, while the sum is 24.

The square root of 28330224 is about 5322.6143952009. The cubic root of 28330224 is about 304.8479901841.

The spelling of 28330224 in words is "twenty-eight million, three hundred thirty thousand, two hundred twenty-four".