16224420 has 24 divisors (see below), whose sum is σ = 45428544. Its totient is φ = 4326496.

The previous prime is 16224419. The next prime is 16224449. The reversal of 16224420 is 2442261.

16224420 is digitally balanced in base 2 and base 4, because in such bases it contains all the possibile digits an equal number of times.

It is an unprimeable number.

It is a polite number, since it can be written in 7 ways as a sum of consecutive naturals, for example, 135144 + ... + 135263.

It is an arithmetic number, because the mean of its divisors is an integer number (1892856).

Almost surely, 2^16224420 is an apocalyptic number.

16224420 is a gapful number since it is divisible by the number (10) formed by its first and last digit.

It is an amenable number.

16224420 is an abundant number, since it is smaller than the sum of its proper divisors (29204124).

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

16224420 is a wasteful number, since it uses less digits than its factorization.

16224420 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 270419 (or 270417 counting only the distinct ones).

The product of its (nonzero) digits is 768, while the sum is 21.

The square root of 16224420 is about 4027.9548160326. The cubic root of 16224420 is about 253.1568754249.

Adding to 16224420 its reverse (2442261), we get a palindrome (18666681).

The spelling of 16224420 in words is "sixteen million, two hundred twenty-four thousand, four hundred twenty".