22040352 has 72 divisors (see below), whose sum is σ = 63370944. Its totient is φ = 7265664.

The previous prime is 22040303. The next prime is 22040353. The reversal of 22040352 is 25304022.

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

It is a Harshad number since it is a multiple of its sum of digits (18).

It is not an unprimeable number, because it can be changed into a prime (22040353) 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, 29293 + ... + 30035.

It is an arithmetic number, because the mean of its divisors is an integer number (880152).

Almost surely, 2^22040352 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 22040352, and also a Zumkeller number, because its divisors can be partitioned in two sets with the same sum (31685472).

22040352 is an abundant number, since it is smaller than the sum of its proper divisors (41330592).

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

22040352 is a wasteful number, since it uses less digits than its factorization.

22040352 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 862 (or 851 counting only the distinct ones).

The product of its (nonzero) digits is 480, while the sum is 18.

The square root of 22040352 is about 4694.7153268329. The cubic root of 22040352 is about 280.3751434177.

Adding to 22040352 its reverse (25304022), we get a palindrome (47344374).

The spelling of 22040352 in words is "twenty-two million, forty thousand, three hundred fifty-two".