18196228 has 24 divisors (see below), whose sum is σ = 32659200. Its totient is φ = 8868288.

The previous prime is 18196219. The next prime is 18196229. The reversal of 18196228 is 82269181.

It is a super-3 number, since 3×18196228³ (a number of 23 digits) contains 333 as substring. Note that it is a super-d number also for d = 2.

It is not an unprimeable number, because it can be changed into a prime (18196229) 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, 27801 + ... + 28447.

It is an arithmetic number, because the mean of its divisors is an integer number (1360800).

Almost surely, 2^18196228 is an apocalyptic number.

It is an amenable number.

18196228 is a deficient number, since it is larger than the sum of its proper divisors (14462972).

18196228 is a wasteful number, since it uses less digits than its factorization.

18196228 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 819 (or 817 counting only the distinct ones).

The product of its digits is 13824, while the sum is 37.

The square root of 18196228 is about 4265.7036934133. The cubic root of 18196228 is about 263.0230381684.

The spelling of 18196228 in words is "eighteen million, one hundred ninety-six thousand, two hundred twenty-eight".