28322316 has 72 divisors (see below), whose sum is σ = 80253264. Its totient is φ = 8346240.

The previous prime is 28322311. The next prime is 28322317. The reversal of 28322316 is 61322382.

28322316 is a `hidden beast` number, since 28 + 322 + 316 = 666.

It is a self number, because there is not a number n which added to its sum of digits gives 28322316.

It is not an unprimeable number, because it can be changed into a prime (28322311) 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, 13686 + ... + 15618.

Almost surely, 2^28322316 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 28322316, and also a Zumkeller number, because its divisors can be partitioned in two sets with the same sum (40126632).

28322316 is an abundant number, since it is smaller than the sum of its proper divisors (51930948).

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

28322316 is a wasteful number, since it uses less digits than its factorization.

28322316 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 1991 (or 1986 counting only the distinct ones).

The product of its digits is 3456, while the sum is 27.

The square root of 28322316 is about 5321.8714753365. The cubic root of 28322316 is about 304.8196228093.

Adding to 28322316 its reverse (61322382), we get a palindrome (89644698).

The spelling of 28322316 in words is "twenty-eight million, three hundred twenty-two thousand, three hundred sixteen".