28199682 has 48 divisors (see below), whose sum is σ = 70736640. Its totient is φ = 7952256.

The previous prime is 28199663. The next prime is 28199683. The reversal of 28199682 is 28699182.

It is a super-2 number, since 2×28199682² = 1590444129802248, which contains 22 as substring.

It is not an unprimeable number, because it can be changed into a prime (28199683) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (11) of ones.

It is a polite number, since it can be written in 23 ways as a sum of consecutive naturals, for example, 8538 + ... + 11370.

It is an arithmetic number, because the mean of its divisors is an integer number (1473680).

Almost surely, 2^28199682 is an apocalyptic number.

It is a practical number, because each smaller number is the sum of distinct divisors of 28199682, and also a Zumkeller number, because its divisors can be partitioned in two sets with the same sum (35368320).

28199682 is an abundant number, since it is smaller than the sum of its proper divisors (42536958).

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

28199682 is a wasteful number, since it uses less digits than its factorization.

28199682 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 2927 (or 2924 counting only the distinct ones).

The product of its digits is 124416, while the sum is 45.

The square root of 28199682 is about 5310.3372774241. The cubic root of 28199682 is about 304.3790358098.

Subtracting 28199682 from its reverse (28699182), we obtain a triangular number (499500 = T₉₉₉).

The spelling of 28199682 in words is "twenty-eight million, one hundred ninety-nine thousand, six hundred eighty-two".