28199823 has 8 divisors (see below), whose sum is σ = 37712688. Its totient is φ = 18743424.

The previous prime is 28199807. The next prime is 28199833. The reversal of 28199823 is 32899182.

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

It is not a de Polignac number, because 28199823 - 2⁴ = 28199807 is a prime.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (28199833) 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, 12936 + ... + 14957.

It is an arithmetic number, because the mean of its divisors is an integer number (4714086).

Almost surely, 2^28199823 is an apocalyptic number.

28199823 is a deficient number, since it is larger than the sum of its proper divisors (9512865).

28199823 is a wasteful number, since it uses less digits than its factorization.

28199823 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 28233.

The product of its digits is 62208, while the sum is 42.

The square root of 28199823 is about 5310.3505534004. The cubic root of 28199823 is about 304.3795431131.

The spelling of 28199823 in words is "twenty-eight million, one hundred ninety-nine thousand, eight hundred twenty-three".