28099469 has 4 divisors (see below), whose sum is σ = 28217280. Its totient is φ = 27981660.

The previous prime is 28099451. The next prime is 28099493. The reversal of 28099469 is 96499082.

It is a semiprime because it is the product of two primes, and also a Blum integer, because the two primes are equal to 3 mod 4.

It is a cyclic number.

It is not a de Polignac number, because 28099469 - 2⁸ = 28099213 is a prime.

It is a super-2 number, since 2×28099469² = 1579160316163922, which contains 22 as substring.

It is a Duffinian number.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (28099429) 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 3 ways as a sum of consecutive naturals, for example, 58547 + ... + 59024.

It is an arithmetic number, because the mean of its divisors is an integer number (7054320).

Almost surely, 2^28099469 is an apocalyptic number.

It is an amenable number.

28099469 is a deficient number, since it is larger than the sum of its proper divisors (117811).

28099469 is a wasteful number, since it uses less digits than its factorization.

28099469 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 117810.

The product of its (nonzero) digits is 279936, while the sum is 47.

The square root of 28099469 is about 5300.8932266176. The cubic root of 28099469 is about 304.0180513577.

The spelling of 28099469 in words is "twenty-eight million, ninety-nine thousand, four hundred sixty-nine".