16218244 has 24 divisors (see below), whose sum is σ = 32540480. Its totient is φ = 6928416.

The previous prime is 16218227. The next prime is 16218259. The reversal of 16218244 is 44281261.

It is a Harshad number since it is a multiple of its sum of digits (28).

It is an unprimeable number.

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, 10387 + ... + 11845.

Almost surely, 2^16218244 is an apocalyptic number.

16218244 is a gapful number since it is divisible by the number (14) formed by its first and last digit.

It is an amenable number.

16218244 is an abundant number, since it is smaller than the sum of its proper divisors (16322236).

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

16218244 is a wasteful number, since it uses less digits than its factorization.

16218244 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 1867 (or 1865 counting only the distinct ones).

The product of its digits is 3072, while the sum is 28.

The square root of 16218244 is about 4027.1881008962. The cubic root of 16218244 is about 253.1247490522.

The spelling of 16218244 in words is "sixteen million, two hundred eighteen thousand, two hundred forty-four".