28324816 has 20 divisors (see below), whose sum is σ = 59101252. Its totient is φ = 13072896.

The previous prime is 28324789. The next prime is 28324847. The reversal of 28324816 is 61842382.

It can be written as a sum of positive squares in 2 ways, for example, as 19324816 + 9000000 = 4396^2 + 3000^2 .

It is a congruent number.

It is an unprimeable number.

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 3 ways as a sum of consecutive naturals, for example, 67881 + ... + 68296.

Almost surely, 2^28324816 is an apocalyptic number.

28324816 is a gapful number since it is divisible by the number (26) formed by its first and last digit.

It is an amenable number.

28324816 is an abundant number, since it is smaller than the sum of its proper divisors (30776436).

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

28324816 is a wasteful number, since it uses less digits than its factorization.

28324816 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 136198 (or 136192 counting only the distinct ones).

The product of its digits is 18432, while the sum is 34.

The square root of 28324816 is about 5322.1063499333. The cubic root of 28324816 is about 304.8285913159.

The spelling of 28324816 in words is "twenty-eight million, three hundred twenty-four thousand, eight hundred sixteen".