28023899 has 8 divisors (see below), whose sum is σ = 28304640. Its totient is φ = 27745000.

The previous prime is 28023857. The next prime is 28023923. The reversal of 28023899 is 99832082.

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

It is a cyclic number.

It is a de Polignac number, because none of the positive numbers 2^k-28023899 is a prime.

It is a Duffinian number.

It is not an unprimeable number, because it can be changed into a prime (28023199) 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, 77882 + ... + 78240.

It is an arithmetic number, because the mean of its divisors is an integer number (3538080).

Almost surely, 2^28023899 is an apocalyptic number.

28023899 is a deficient number, since it is larger than the sum of its proper divisors (280741).

28023899 is a wasteful number, since it uses less digits than its factorization.

28023899 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 921.

The product of its (nonzero) digits is 62208, while the sum is 41.

The square root of 28023899 is about 5293.7603836970. The cubic root of 28023899 is about 303.7452671902.

The spelling of 28023899 in words is "twenty-eight million, twenty-three thousand, eight hundred ninety-nine".