28818999 has 12 divisors (see below), whose sum is σ = 45411912. Its totient is φ = 17466000.

The previous prime is 28818997. The next prime is 28819003. The reversal of 28818999 is 99981882.

It is a happy number.

It is not a de Polignac number, because 28818999 - 2¹ = 28818997 is a prime.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (28818997) by changing a digit.

It is a polite number, since it can be written in 11 ways as a sum of consecutive naturals, for example, 145452 + ... + 145649.

It is an arithmetic number, because the mean of its divisors is an integer number (3784326).

Almost surely, 2^28818999 is an apocalyptic number.

28818999 is a deficient number, since it is larger than the sum of its proper divisors (16592913).

28818999 is a wasteful number, since it uses less digits than its factorization.

28818999 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 291118 (or 291115 counting only the distinct ones).

The product of its digits is 746496, while the sum is 54.

The square root of 28818999 is about 5368.3329814757. The cubic root of 28818999 is about 306.5911614416.

The spelling of 28818999 in words is "twenty-eight million, eight hundred eighteen thousand, nine hundred ninety-nine".