16224640 has 64 divisors (see below), whose sum is σ = 39327120. Its totient is φ = 6400000.

The previous prime is 16224629. The next prime is 16224641. The reversal of 16224640 is 4642261.

It is a tau number, because it is divible by the number of its divisors (64).

It is a plaindrome in base 14.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (16224641) 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 7 ways as a sum of consecutive naturals, for example, 64515 + ... + 64765.

Almost surely, 2^16224640 is an apocalyptic number.

16224640 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 16224640, and also a Zumkeller number, because its divisors can be partitioned in two sets with the same sum (19663560).

16224640 is an abundant number, since it is smaller than the sum of its proper divisors (23102480).

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

16224640 is a wasteful number, since it uses less digits than its factorization.

16224640 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 371 (or 359 counting only the distinct ones).

The product of its (nonzero) digits is 2304, while the sum is 25.

The square root of 16224640 is about 4027.9821250845. The cubic root of 16224640 is about 253.1580196725.

The spelling of 16224640 in words is "sixteen million, two hundred twenty-four thousand, six hundred forty".