28317899 has 12 divisors (see below), whose sum is σ = 29862000. Its totient is φ = 26850384.

The previous prime is 28317881. The next prime is 28317907. The reversal of 28317899 is 99871382.

It is not a de Polignac number, because 28317899 - 2¹⁶ = 28252363 is a prime.

It is a Duffinian number.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (28317199) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (11) of ones.

It is a polite number, since it can be written in 11 ways as a sum of consecutive naturals, for example, 105137 + ... + 105405.

It is an arithmetic number, because the mean of its divisors is an integer number (2488500).

Almost surely, 2^28317899 is an apocalyptic number.

28317899 is a deficient number, since it is larger than the sum of its proper divisors (1544101).

28317899 is a wasteful number, since it uses less digits than its factorization.

28317899 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 514 (or 491 counting only the distinct ones).

The product of its digits is 217728, while the sum is 47.

The square root of 28317899 is about 5321.4564735606. The cubic root of 28317899 is about 304.8037759617.

The spelling of 28317899 in words is "twenty-eight million, three hundred seventeen thousand, eight hundred ninety-nine".