28000099 has 8 divisors (see below), whose sum is σ = 29301632. Its totient is φ = 26723520.

The previous prime is 28000097. The next prime is 28000121. The reversal of 28000099 is 99000082.

It is a happy number.

It is a sphenic number, since it is the product of 3 distinct primes.

It is a cyclic number.

It is not a de Polignac number, because 28000099 - 2¹ = 28000097 is a prime.

It is a Duffinian number.

28000099 is a modest number, since divided by 99 gives 28 as remainder.

It is not an unprimeable number, because it can be changed into a prime (28000097) by changing a digit.

It is a polite number, since it can be written in 7 ways as a sum of consecutive naturals, for example, 3924 + ... + 8449.

It is an arithmetic number, because the mean of its divisors is an integer number (3662704).

Almost surely, 2^28000099 is an apocalyptic number.

28000099 is a deficient number, since it is larger than the sum of its proper divisors (1301533).

28000099 is a wasteful number, since it uses less digits than its factorization.

28000099 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 12477.

The product of its (nonzero) digits is 1296, while the sum is 28.

The square root of 28000099 is about 5291.5119767416. The cubic root of 28000099 is about 303.6592550708.

The spelling of 28000099 in words is "twenty-eight million, ninety-nine", and thus it is an aban number and an uban number.