18228834 has 64 divisors (see below), whose sum is σ = 45561600. Its totient is φ = 5360256.

The previous prime is 18228829. The next prime is 18228863. The reversal of 18228834 is 43882281.

It is a happy number.

It is an unprimeable number.

It is a polite number, since it can be written in 31 ways as a sum of consecutive naturals, for example, 15582 + ... + 16710.

It is an arithmetic number, because the mean of its divisors is an integer number (711900).

Almost surely, 2^18228834 is an apocalyptic number.

It is a practical number, because each smaller number is the sum of distinct divisors of 18228834, and also a Zumkeller number, because its divisors can be partitioned in two sets with the same sum (22780800).

18228834 is an abundant number, since it is smaller than the sum of its proper divisors (27332766).

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

18228834 is a wasteful number, since it uses less digits than its factorization.

18228834 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 1176 (or 1170 counting only the distinct ones).

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

The square root of 18228834 is about 4269.5238610412. The cubic root of 18228834 is about 263.1800489461.

The spelling of 18228834 in words is "eighteen million, two hundred twenty-eight thousand, eight hundred thirty-four".