28194199 has 4 divisors (see below), whose sum is σ = 30757320. Its totient is φ = 25631080.

The previous prime is 28194193. The next prime is 28194223. The reversal of 28194199 is 99149182.

It is a happy number.

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 28194199 - 2⁷ = 28194071 is a prime.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (28194193) by changing a digit.

It is a polite number, since it can be written in 3 ways as a sum of consecutive naturals, for example, 1281544 + ... + 1281565.

It is an arithmetic number, because the mean of its divisors is an integer number (7689330).

Almost surely, 2^28194199 is an apocalyptic number.

28194199 is a deficient number, since it is larger than the sum of its proper divisors (2563121).

28194199 is a wasteful number, since it uses less digits than its factorization.

28194199 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 2563120.

The product of its digits is 46656, while the sum is 43.

The square root of 28194199 is about 5309.8209950996. The cubic root of 28194199 is about 304.3593072371.

The spelling of 28194199 in words is "twenty-eight million, one hundred ninety-four thousand, one hundred ninety-nine".