28218799 has 8 divisors (see below), whose sum is σ = 32283648. Its totient is φ = 24162360.

The previous prime is 28218791. The next prime is 28218809. The reversal of 28218799 is 99781282.

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

It is a cyclic number.

It is not a de Polignac number, because 28218799 - 2³ = 28218791 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 (28218791) 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, 9054 + ... + 11764.

It is an arithmetic number, because the mean of its divisors is an integer number (4035456).

Almost surely, 2^28218799 is an apocalyptic number.

28218799 is a deficient number, since it is larger than the sum of its proper divisors (4064849).

28218799 is a wasteful number, since it uses less digits than its factorization.

28218799 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 4205.

The product of its digits is 145152, while the sum is 46.

The square root of 28218799 is about 5312.1369523008. The cubic root of 28218799 is about 304.4478013563.

The spelling of 28218799 in words is "twenty-eight million, two hundred eighteen thousand, seven hundred ninety-nine".