16222280 has 64 divisors (see below), whose sum is σ = 38208240. Its totient is φ = 6193152.

The previous prime is 16222277. The next prime is 16222289. The reversal of 16222280 is 8222261.

It can be written as a sum of positive squares in 8 ways, for example, as 5026564 + 11195716 = 2242^2 + 3346^2 .

It is not an unprimeable number, because it can be changed into a prime (16222289) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (11) of ones.

It is a polite number, since it can be written in 15 ways as a sum of consecutive naturals, for example, 143504 + ... + 143616.

Almost surely, 2^16222280 is an apocalyptic number.

16222280 is a gapful number since it is divisible by the number (10) formed by its first and last digit.

It is an amenable number.

It is a practical number, because each smaller number is the sum of distinct divisors of 16222280, and also a Zumkeller number, because its divisors can be partitioned in two sets with the same sum (19104120).

16222280 is an abundant number, since it is smaller than the sum of its proper divisors (21985960).

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

16222280 is a wasteful number, since it uses less digits than its factorization.

16222280 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 258 (or 254 counting only the distinct ones).

The product of its (nonzero) digits is 768, while the sum is 23.

The square root of 16222280 is about 4027.6891637762. The cubic root of 16222280 is about 253.1457444768.

The spelling of 16222280 in words is "sixteen million, two hundred twenty-two thousand, two hundred eighty".