28218874 has 16 divisors (see below), whose sum is σ = 43545600. Its totient is φ = 13709344.

The previous prime is 28218833. The next prime is 28218877. The reversal of 28218874 is 47881282.

It is not an unprimeable number, because it can be changed into a prime (28218877) 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, 9159 + ... + 11845.

It is an arithmetic number, because the mean of its divisors is an integer number (2721600).

Almost surely, 2^28218874 is an apocalyptic number.

28218874 is a deficient number, since it is larger than the sum of its proper divisors (15326726).

28218874 is a wasteful number, since it uses less digits than its factorization.

28218874 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 2837.

The product of its digits is 57344, while the sum is 40.

The square root of 28218874 is about 5312.1440116021. The cubic root of 28218874 is about 304.4480710768.

It can be divided in two parts, 28218 and 874, that added together give a palindrome (29092).

The spelling of 28218874 in words is "twenty-eight million, two hundred eighteen thousand, eight hundred seventy-four".