18428222 has 8 divisors (see below), whose sum is σ = 28095672. Its totient is φ = 9063000.

The previous prime is 18428213. The next prime is 18428227. The reversal of 18428222 is 22282481.

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

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (18428227) by changing a digit.

It is a polite number, since it can be written in 3 ways as a sum of consecutive naturals, for example, 75404 + ... + 75647.

It is an arithmetic number, because the mean of its divisors is an integer number (3511959).

Almost surely, 2^18428222 is an apocalyptic number.

18428222 is a deficient number, since it is larger than the sum of its proper divisors (9667450).

18428222 is a wasteful number, since it uses less digits than its factorization.

18428222 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 151114.

The product of its digits is 4096, while the sum is 29.

The square root of 18428222 is about 4292.8105012917. The cubic root of 18428222 is about 264.1361308179.

The spelling of 18428222 in words is "eighteen million, four hundred twenty-eight thousand, two hundred twenty-two".