28232204 has 72 divisors (see below), whose sum is σ = 66942624. Its totient is φ = 10137600.

The previous prime is 28232179. The next prime is 28232207. The reversal of 28232204 is 40223282.

It is a self number, because there is not a number n which added to its sum of digits gives 28232204.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (28232207) by changing a digit.

It is a polite number, since it can be written in 23 ways as a sum of consecutive naturals, for example, 43724 + ... + 44364.

Almost surely, 2^28232204 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 28232204, and also a Zumkeller number, because its divisors can be partitioned in two sets with the same sum (33471312).

28232204 is an abundant number, since it is smaller than the sum of its proper divisors (38710420).

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

28232204 is a wasteful number, since it uses less digits than its factorization.

28232204 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 687 (or 674 counting only the distinct ones).

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

The square root of 28232204 is about 5313.3985357773. The cubic root of 28232204 is about 304.4960018097.

Adding to 28232204 its reverse (40223282), we get a palindrome (68455486).

It can be divided in two parts, 28 and 232204, that added together give a palindrome (232232).

The spelling of 28232204 in words is "twenty-eight million, two hundred thirty-two thousand, two hundred four".