28681322 has 12 divisors (see below), whose sum is σ = 44975490. Its totient is φ = 13716648.

The previous prime is 28681313. The next prime is 28681333. The reversal of 28681322 is 22318682.

It can be written as a sum of positive squares in only one way, i.e., 26306641 + 2374681 = 5129^2 + 1541^2 .

It is an unprimeable number.

It is a pernicious number, because its binary representation contains a prime number (13) of ones.

It is a polite number, since it can be written in 5 ways as a sum of consecutive naturals, for example, 12497 + ... + 14612.

Almost surely, 2^28681322 is an apocalyptic number.

28681322 is a deficient number, since it is larger than the sum of its proper divisors (16294168).

28681322 is a wasteful number, since it uses less digits than its factorization.

28681322 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 27157 (or 27134 counting only the distinct ones).

The product of its digits is 9216, while the sum is 32.

The square root of 28681322 is about 5355.4945616628. The cubic root of 28681322 is about 306.1021559330.

The spelling of 28681322 in words is "twenty-eight million, six hundred eighty-one thousand, three hundred twenty-two".