22194816 has 128 divisors (see below), whose sum is σ = 70502400. Its totient is φ = 6048768.

The previous prime is 22194803. The next prime is 22194827. The reversal of 22194816 is 61849122.

It is a tau number, because it is divible by the number of its divisors (128).

It is an unprimeable number.

It is a polite number, since it can be written in 15 ways as a sum of consecutive naturals, for example, 61645 + ... + 62003.

It is an arithmetic number, because the mean of its divisors is an integer number (550800).

Almost surely, 2^22194816 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 22194816, and also a Zumkeller number, because its divisors can be partitioned in two sets with the same sum (35251200).

22194816 is an abundant number, since it is smaller than the sum of its proper divisors (48307584).

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

22194816 is a wasteful number, since it uses less digits than its factorization.

22194816 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 406 (or 394 counting only the distinct ones).

The product of its digits is 6912, while the sum is 33.

The square root of 22194816 is about 4711.1374422744. The cubic root of 22194816 is about 281.0285977067.

The spelling of 22194816 in words is "twenty-two million, one hundred ninety-four thousand, eight hundred sixteen".