22232340 has 96 divisors (see below), whose sum is σ = 74511360. Its totient is φ = 5470848.

The previous prime is 22232323. The next prime is 22232341. The reversal of 22232340 is 4323222.

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

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (22232341) by changing a digit.

It is a polite number, since it can be written in 31 ways as a sum of consecutive naturals, for example, 5437 + ... + 8603.

It is an arithmetic number, because the mean of its divisors is an integer number (776160).

Almost surely, 2^22232340 is an apocalyptic number.

22232340 is a gapful number since it is divisible by the number (20) formed by its first and last digit.

It is an amenable number.

It is a practical number, because each smaller number is the sum of distinct divisors of 22232340, and also a Zumkeller number, because its divisors can be partitioned in two sets with the same sum (37255680).

22232340 is an abundant number, since it is smaller than the sum of its proper divisors (52279020).

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

22232340 is a wasteful number, since it uses less digits than its factorization.

22232340 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 3198 (or 3190 counting only the distinct ones).

The product of its (nonzero) digits is 576, while the sum is 18.

The square root of 22232340 is about 4715.1182381781. The cubic root of 22232340 is about 281.1868836146.

Adding to 22232340 its reverse (4323222), we get a palindrome (26555562).

The spelling of 22232340 in words is "twenty-two million, two hundred thirty-two thousand, three hundred forty".