28816999 has 4 divisors (see below), whose sum is σ = 30069936. Its totient is φ = 27564064.

The previous prime is 28816993. The next prime is 28817003. The reversal of 28816999 is 99961882.

It is a semiprime because it is the product of two primes.

It is a cyclic number.

It is not a de Polignac number, because 28816999 - 2⁵ = 28816967 is a prime.

It is a Duffinian number.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (28816993) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (17) of ones.

It is a polite number, since it can be written in 3 ways as a sum of consecutive naturals, for example, 626434 + ... + 626479.

It is an arithmetic number, because the mean of its divisors is an integer number (7517484).

Almost surely, 2^28816999 is an apocalyptic number.

28816999 is a deficient number, since it is larger than the sum of its proper divisors (1252937).

28816999 is a wasteful number, since it uses less digits than its factorization.

28816999 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 1252936.

The product of its digits is 559872, while the sum is 52.

The square root of 28816999 is about 5368.1467006780. The cubic root of 28816999 is about 306.5840689387.

The spelling of 28816999 in words is "twenty-eight million, eight hundred sixteen thousand, nine hundred ninety-nine".