22191072 has 48 divisors (see below), whose sum is σ = 58705920. Its totient is φ = 7339392.

The previous prime is 22191019. The next prime is 22191073. The reversal of 22191072 is 27019122.

It is a tau number, because it is divible by the number of its divisors (48).

It is a Harshad number since it is a multiple of its sum of digits (24).

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (22191073) by changing a digit.

It is a polite number, since it can be written in 7 ways as a sum of consecutive naturals, for example, 12513 + ... + 14175.

It is an arithmetic number, because the mean of its divisors is an integer number (1223040).

Almost surely, 2^22191072 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 22191072, and also a Zumkeller number, because its divisors can be partitioned in two sets with the same sum (29352960).

22191072 is an abundant number, since it is smaller than the sum of its proper divisors (36514848).

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

22191072 is a wasteful number, since it uses less digits than its factorization.

22191072 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 1815 (or 1807 counting only the distinct ones).

The product of its (nonzero) digits is 504, while the sum is 24.

The square root of 22191072 is about 4710.7400692460. The cubic root of 22191072 is about 281.0127947636.

The spelling of 22191072 in words is "twenty-two million, one hundred ninety-one thousand, seventy-two".