16428818 has 12 divisors (see below), whose sum is σ = 28666782. Its totient is φ = 7040880.

The previous prime is 16428779. The next prime is 16428829. The reversal of 16428818 is 81882461.

It can be written as a sum of positive squares in only one way, i.e., 15311569 + 1117249 = 3913^2 + 1057^2 .

It is a Curzon number.

It is an unprimeable number.

It is a polite number, since it can be written in 5 ways as a sum of consecutive naturals, for example, 83723 + ... + 83918.

Almost surely, 2^16428818 is an apocalyptic number.

16428818 is a deficient number, since it is larger than the sum of its proper divisors (12237964).

16428818 is a wasteful number, since it uses less digits than its factorization.

16428818 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 167657 (or 167650 counting only the distinct ones).

The product of its digits is 24576, while the sum is 38.

The square root of 16428818 is about 4053.2478335281. The cubic root of 16428818 is about 254.2155464652.

It can be divided in two parts, 164 and 28818, that added together give a palindrome (28982).

The spelling of 16428818 in words is "sixteen million, four hundred twenty-eight thousand, eight hundred eighteen".