28099616 has 12 divisors (see below), whose sum is σ = 55321182. Its totient is φ = 14049792.

The previous prime is 28099601. The next prime is 28099619. The reversal of 28099616 is 61699082.

It can be written as a sum of positive squares in only one way, i.e., 14409616 + 13690000 = 3796^2 + 3700^2 .

It is not an unprimeable number, because it can be changed into a prime (28099619) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 439025 + ... + 439088.

Almost surely, 2^28099616 is an apocalyptic number.

It is an amenable number.

28099616 is a deficient number, since it is larger than the sum of its proper divisors (27221566).

28099616 is an equidigital number, since it uses as much as digits as its factorization.

28099616 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 878123 (or 878115 counting only the distinct ones).

The product of its (nonzero) digits is 46656, while the sum is 41.

The square root of 28099616 is about 5300.9070921871. The cubic root of 28099616 is about 304.0185815050.

The spelling of 28099616 in words is "twenty-eight million, ninety-nine thousand, six hundred sixteen".