28409199 has 32 divisors (see below), whose sum is σ = 49082880. Its totient is φ = 14193792.

The previous prime is 28409189. The next prime is 28409203. The reversal of 28409199 is 99190482.

It is not a de Polignac number, because 28409199 - 2⁸ = 28408943 is a prime.

It is a self number, because there is not a number n which added to its sum of digits gives 28409199.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (28409189) 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 31 ways as a sum of consecutive naturals, for example, 2449 + ... + 7925.

It is an arithmetic number, because the mean of its divisors is an integer number (1533840).

Almost surely, 2^28409199 is an apocalyptic number.

28409199 is a deficient number, since it is larger than the sum of its proper divisors (20673681).

28409199 is a wasteful number, since it uses less digits than its factorization.

28409199 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 5519.

The product of its (nonzero) digits is 46656, while the sum is 42.

The square root of 28409199 is about 5330.0280487067. The cubic root of 28409199 is about 305.1309981041.

The spelling of 28409199 in words is "twenty-eight million, four hundred nine thousand, one hundred ninety-nine".