28300216 has 32 divisors (see below), whose sum is σ = 61223040. Its totient is φ = 12012768.

The previous prime is 28300213. The next prime is 28300219. The reversal of 28300216 is 61200382.

It is an interprime number because it is at equal distance from previous prime (28300213) and next prime (28300219).

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (28300213) 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, 3631 + ... + 8353.

It is an arithmetic number, because the mean of its divisors is an integer number (1913220).

Almost surely, 2^28300216 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 28300216, and also a Zumkeller number, because its divisors can be partitioned in two sets with the same sum (30611520).

28300216 is an abundant number, since it is smaller than the sum of its proper divisors (32922824).

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

28300216 is a wasteful number, since it uses less digits than its factorization.

28300216 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 4843 (or 4839 counting only the distinct ones).

The product of its (nonzero) digits is 576, while the sum is 22.

The square root of 28300216 is about 5319.7947328821. The cubic root of 28300216 is about 304.7403182472.

Adding to 28300216 its reverse (61200382), we get a palindrome (89500598).

It can be divided in two parts, 28 and 300216, that multiplied together give a palindrome (8406048).

The spelling of 28300216 in words is "twenty-eight million, three hundred thousand, two hundred sixteen".