16223418 has 48 divisors (see below), whose sum is σ = 37065600. Its totient is φ = 5118432.

The previous prime is 16223411. The next prime is 16223443. The reversal of 16223418 is 81432261.

16223418 is a `hidden beast` number, since 1 + 622 + 34 + 1 + 8 = 666.

It is a plaindrome in base 14.

It is a junction number, because it is equal to n+sod(n) for n = 16223391 and 16223400.

It is not an unprimeable number, because it can be changed into a prime (16223411) by changing a digit.

It is a polite number, since it can be written in 23 ways as a sum of consecutive naturals, for example, 61555 + ... + 61817.

It is an arithmetic number, because the mean of its divisors is an integer number (772200).

Almost surely, 2^16223418 is an apocalyptic number.

16223418 is a gapful number since it is divisible by the number (18) formed by its first and last digit.

It is a practical number, because each smaller number is the sum of distinct divisors of 16223418, and also a Zumkeller number, because its divisors can be partitioned in two sets with the same sum (18532800).

16223418 is an abundant number, since it is smaller than the sum of its proper divisors (20842182).

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

16223418 is a wasteful number, since it uses less digits than its factorization.

16223418 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 443 (or 440 counting only the distinct ones).

The product of its digits is 2304, while the sum is 27.

The square root of 16223418 is about 4027.8304333723. The cubic root of 16223418 is about 253.1516637664.

Adding to 16223418 its reverse (81432261), we get a palindrome (97655679).

It can be divided in two parts, 16223 and 418, that added together give a square (16641 = 129²).

The spelling of 16223418 in words is "sixteen million, two hundred twenty-three thousand, four hundred eighteen".