16422144 has 36 divisors (see below), whose sum is σ = 43708896. Its totient is φ = 5473792.

The previous prime is 16422143. The next prime is 16422163. The reversal of 16422144 is 44122461.

It is a happy number.

It is a Harshad number since it is a multiple of its sum of digits (24).

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

It is a nialpdrome in base 4 and base 16.

It is a zygodrome in base 4.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (16422143) by changing a digit.

It is a polite number, since it can be written in 3 ways as a sum of consecutive naturals, for example, 9924 + ... + 11459.

It is an arithmetic number, because the mean of its divisors is an integer number (1214136).

Almost surely, 2^16422144 is an apocalyptic number.

It is an amenable number.

16422144 is an abundant number, since it is smaller than the sum of its proper divisors (27286752).

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

16422144 is an equidigital number, since it uses as much as digits as its factorization.

16422144 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 21402 (or 21388 counting only the distinct ones).

The product of its digits is 1536, while the sum is 24.

The square root of 16422144 is about 4052.4244595057. The cubic root of 16422144 is about 254.1811178501.

The spelling of 16422144 in words is "sixteen million, four hundred twenty-two thousand, one hundred forty-four".