28065299 has 8 divisors (see below), whose sum is σ = 29615040. Its totient is φ = 26522856.

The previous prime is 28065293. The next prime is 28065343. The reversal of 28065299 is 99256082.

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 28065299 - 2⁸ = 28065043 is a prime.

It is a super-2 number, since 2×28065299² = 1575322015918802, which contains 22 as substring.

It is a Duffinian number.

It is not an unprimeable number, because it can be changed into a prime (28065293) by changing a digit.

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 7 ways as a sum of consecutive naturals, for example, 7292 + ... + 10454.

It is an arithmetic number, because the mean of its divisors is an integer number (3701880).

Almost surely, 2^28065299 is an apocalyptic number.

28065299 is a deficient number, since it is larger than the sum of its proper divisors (1549741).

28065299 is a wasteful number, since it uses less digits than its factorization.

28065299 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 3649.

The product of its (nonzero) digits is 77760, while the sum is 41.

The square root of 28065299 is about 5297.6692044710. The cubic root of 28065299 is about 303.8947689508.

The spelling of 28065299 in words is "twenty-eight million, sixty-five thousand, two hundred ninety-nine".