28148218 has 16 divisors (see below), whose sum is σ = 48343680. Its totient is φ = 12041136.

The previous prime is 28148213. The next prime is 28148249. The reversal of 28148218 is 81284182.

It is not an unprimeable number, because it can be changed into a prime (28148213) 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, 7603 + ... + 10681.

It is an arithmetic number, because the mean of its divisors is an integer number (3021480).

Almost surely, 2^28148218 is an apocalyptic number.

28148218 is a deficient number, since it is larger than the sum of its proper divisors (20195462).

28148218 is a wasteful number, since it uses less digits than its factorization.

28148218 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 3741.

The product of its digits is 8192, while the sum is 34.

The square root of 28148218 is about 5305.4894213447. The cubic root of 28148218 is about 304.1937606523.

The spelling of 28148218 in words is "twenty-eight million, one hundred forty-eight thousand, two hundred eighteen".