22170528 has 72 divisors (see below), whose sum is σ = 65808288. Its totient is φ = 7066752.

The previous prime is 22170521. The next prime is 22170541. The reversal of 22170528 is 82507122.

It is a tau number, because it is divible by the number of its divisors (72).

It is a hoax number, since the sum of its digits (27) coincides with the sum of the digits of its distinct prime factors.

It is not an unprimeable number, because it can be changed into a prime (22170521) by changing a digit.

It is a polite number, since it can be written in 11 ways as a sum of consecutive naturals, for example, 4951 + ... + 8297.

It is an arithmetic number, because the mean of its divisors is an integer number (914004).

Almost surely, 2^22170528 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 22170528, and also a Zumkeller number, because its divisors can be partitioned in two sets with the same sum (32904144).

22170528 is an abundant number, since it is smaller than the sum of its proper divisors (43637760).

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

22170528 is a wasteful number, since it uses less digits than its factorization.

22170528 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 3386 (or 3375 counting only the distinct ones).

The product of its (nonzero) digits is 2240, while the sum is 27.

The square root of 22170528 is about 4708.5590152402. The cubic root of 22170528 is about 280.9260495279.

The spelling of 22170528 in words is "twenty-two million, one hundred seventy thousand, five hundred twenty-eight".