22045590 has 72 divisors (see below), whose sum is σ = 66690000. Its totient is φ = 5037984.

The previous prime is 22045589. The next prime is 22045591. The reversal of 22045590 is 9554022.

It is an interprime number because it is at equal distance from previous prime (22045589) and next prime (22045591).

It is a Curzon number.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (22045591) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (11) of ones.

It is a polite number, since it can be written in 35 ways as a sum of consecutive naturals, for example, 1911 + ... + 6909.

It is an arithmetic number, because the mean of its divisors is an integer number (926250).

Almost surely, 2^22045590 is an apocalyptic number.

It is a practical number, because each smaller number is the sum of distinct divisors of 22045590, and also a Zumkeller number, because its divisors can be partitioned in two sets with the same sum (33345000).

22045590 is an abundant number, since it is smaller than the sum of its proper divisors (44644410).

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

22045590 is a wasteful number, since it uses less digits than its factorization.

22045590 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 5026 (or 5016 counting only the distinct ones).

The product of its (nonzero) digits is 3600, while the sum is 27.

The square root of 22045590 is about 4695.2731549932. The cubic root of 22045590 is about 280.3973525106.

The spelling of 22045590 in words is "twenty-two million, forty-five thousand, five hundred ninety".