16626222 has 40 divisors (see below), whose sum is σ = 38550600. Its totient is φ = 5349456.

The previous prime is 16626173. The next prime is 16626223. The reversal of 16626222 is 22262661.

16626222 is a `hidden beast` number, since 16 + 626 + 2 + 22 = 666.

It is a Harshad number since it is a multiple of its sum of digits (27).

It is a nude number because it is divisible by every one of its digits.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (16626223) by changing a digit.

It is a polite number, since it can be written in 19 ways as a sum of consecutive naturals, for example, 2929 + ... + 6467.

It is an arithmetic number, because the mean of its divisors is an integer number (963765).

Almost surely, 2^16626222 is an apocalyptic number.

It is a practical number, because each smaller number is the sum of distinct divisors of 16626222, and also a Zumkeller number, because its divisors can be partitioned in two sets with the same sum (19275300).

16626222 is an abundant number, since it is smaller than the sum of its proper divisors (21924378).

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

16626222 is a wasteful number, since it uses less digits than its factorization.

16626222 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 3582 (or 3573 counting only the distinct ones).

The product of its digits is 3456, while the sum is 27.

The square root of 16626222 is about 4077.5264560760. The cubic root of 16626222 is about 255.2296892409.

Adding to 16626222 its reverse (22262661), we get a palindrome (38888883).

The spelling of 16626222 in words is "sixteen million, six hundred twenty-six thousand, two hundred twenty-two".