18348228 has 24 divisors (see below), whose sum is σ = 47569760. Its totient is φ = 6116040.

The previous prime is 18348223. The next prime is 18348241. The reversal of 18348228 is 82284381.

It is a happy number.

It is a Harshad number since it is a multiple of its sum of digits (36).

It is a junction number, because it is equal to n+sod(n) for n = 18348192 and 18348201.

It is not an unprimeable number, because it can be changed into a prime (18348223) 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, 84838 + ... + 85053.

Almost surely, 2^18348228 is an apocalyptic number.

18348228 is a gapful number since it is divisible by the number (18) formed by its first and last digit.

It is an amenable number.

18348228 is an abundant number, since it is smaller than the sum of its proper divisors (29221532).

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

18348228 is a wasteful number, since it uses less digits than its factorization.

18348228 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 169904 (or 169896 counting only the distinct ones).

The product of its digits is 24576, while the sum is 36.

The square root of 18348228 is about 4283.4831621007. The cubic root of 18348228 is about 263.7533854001.

The spelling of 18348228 in words is "eighteen million, three hundred forty-eight thousand, two hundred twenty-eight".