19844216 has 96 divisors (see below), whose sum is σ = 47278080. Its totient is φ = 7761600.

The previous prime is 19844197. The next prime is 19844233. The reversal of 19844216 is 61244891.

It is a happy number.

It is a congruent number.

It is an unprimeable number.

It is a pernicious number, because its binary representation contains a prime number (13) of ones.

It is a polite number, since it can be written in 23 ways as a sum of consecutive naturals, for example, 279461 + ... + 279531.

It is an arithmetic number, because the mean of its divisors is an integer number (492480).

Almost surely, 2^19844216 is an apocalyptic number.

It is an amenable number.

It is a practical number, because each smaller number is the sum of distinct divisors of 19844216, and also a Zumkeller number, because its divisors can be partitioned in two sets with the same sum (23639040).

19844216 is an abundant number, since it is smaller than the sum of its proper divisors (27433864).

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

19844216 is a wasteful number, since it uses less digits than its factorization.

19844216 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 145 (or 134 counting only the distinct ones).

The product of its digits is 13824, while the sum is 35.

The square root of 19844216 is about 4454.6847250956. The cubic root of 19844216 is about 270.7351524413.

The spelling of 19844216 in words is "nineteen million, eight hundred forty-four thousand, two hundred sixteen".