18888222 has 16 divisors (see below), whose sum is σ = 39079440. Its totient is φ = 6078912.

The previous prime is 18888217. The next prime is 18888257. The reversal of 18888222 is 22288881.

It is a congruent number.

It is an unprimeable number.

It is a polite number, since it can be written in 7 ways as a sum of consecutive naturals, for example, 54103 + ... + 54450.

It is an arithmetic number, because the mean of its divisors is an integer number (2442465).

Almost surely, 2^18888222 is an apocalyptic number.

18888222 is an abundant number, since it is smaller than the sum of its proper divisors (20191218).

It is a pseudoperfect number, because it is the sum of a subset of its proper divisors.

18888222 is a wasteful number, since it uses less digits than its factorization.

18888222 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 108587.

The product of its digits is 32768, while the sum is 39.

The square root of 18888222 is about 4346.0582140602. The cubic root of 18888222 is about 266.3158571026.

It can be divided in two parts, 18888 and 222, that added together give a triangular number (19110 = T₁₉₅).

The spelling of 18888222 in words is "eighteen million, eight hundred eighty-eight thousand, two hundred twenty-two".