18228606 has 16 divisors (see below), whose sum is σ = 39771648. Its totient is φ = 5523800.

The previous prime is 18228601. The next prime is 18228649. The reversal of 18228606 is 60682281.

It is a Smith number, since the sum of its digits (33) coincides with the sum of the digits of its prime factors. Since it is squarefree, it is also a hoax number.

It is a Harshad number since it is a multiple of its sum of digits (33).

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (18228601) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (13) of ones.

It is a polite number, since it can be written in 7 ways as a sum of consecutive naturals, for example, 138030 + ... + 138161.

It is an arithmetic number, because the mean of its divisors is an integer number (2485728).

Almost surely, 2^18228606 is an apocalyptic number.

18228606 is an abundant number, since it is smaller than the sum of its proper divisors (21543042).

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

18228606 is a wasteful number, since it uses less digits than its factorization.

18228606 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 276207.

The product of its (nonzero) digits is 9216, while the sum is 33.

The square root of 18228606 is about 4269.4971600881. The cubic root of 18228606 is about 263.1789516863.

The spelling of 18228606 in words is "eighteen million, two hundred twenty-eight thousand, six hundred six".