18228152 has 8 divisors (see below), whose sum is σ = 34177800. Its totient is φ = 9114072.

The previous prime is 18228083. The next prime is 18228157. The reversal of 18228152 is 25182281.

It is a happy number.

It is a tau number, because it is divible by the number of its divisors (8).

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (18228157) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (11) of ones.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 1139252 + ... + 1139267.

It is an arithmetic number, because the mean of its divisors is an integer number (4272225).

Almost surely, 2^18228152 is an apocalyptic number.

It is an amenable number.

18228152 is a deficient number, since it is larger than the sum of its proper divisors (15949648).

18228152 is a wasteful number, since it uses less digits than its factorization.

18228152 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 2278525 (or 2278521 counting only the distinct ones).

The product of its digits is 2560, while the sum is 29.

The square root of 18228152 is about 4269.4439919034. The cubic root of 18228152 is about 263.1767667645.

The spelling of 18228152 in words is "eighteen million, two hundred twenty-eight thousand, one hundred fifty-two".