22194688 has 40 divisors (see below), whose sum is σ = 45077472. Its totient is φ = 10914816.

The previous prime is 22194677. The next prime is 22194691. The reversal of 22194688 is 88649122.

It is a self number, because there is not a number n which added to its sum of digits gives 22194688.

It is an unprimeable number.

It is a polite number, since it can be written in 3 ways as a sum of consecutive naturals, for example, 33981 + ... + 34627.

Almost surely, 2^22194688 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 22194688, and also a Zumkeller number, because its divisors can be partitioned in two sets with the same sum (22538736).

22194688 is an abundant number, since it is smaller than the sum of its proper divisors (22882784).

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

22194688 is an frugal number, since it uses more digits than its factorization.

22194688 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 732 (or 716 counting only the distinct ones).

The product of its digits is 55296, while the sum is 40.

The square root of 22194688 is about 4711.1238574251. The cubic root of 22194688 is about 281.0280574644.

The spelling of 22194688 in words is "twenty-two million, one hundred ninety-four thousand, six hundred eighty-eight".