22324240 has 60 divisors (see below), whose sum is σ = 54850284. Its totient is φ = 8448768.

The previous prime is 22324219. The next prime is 22324241. The reversal of 22324240 is 4242322.

It can be written as a sum of positive squares in 2 ways, for example, as 4210704 + 18113536 = 2052^2 + 4256^2 .

It is a super-3 number, since 3×22324240³ (a number of 23 digits) contains 333 as substring.

It is a Harshad number since it is a multiple of its sum of digits (19).

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (22324241) 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, 28494 + ... + 29266.

Almost surely, 2^22324240 is an apocalyptic number.

22324240 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 22324240, and also a Zumkeller number, because its divisors can be partitioned in two sets with the same sum (27425142).

22324240 is an abundant number, since it is smaller than the sum of its proper divisors (32526044).

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

22324240 is a wasteful number, since it uses less digits than its factorization.

22324240 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 824 (or 799 counting only the distinct ones).

The product of its (nonzero) digits is 768, while the sum is 19.

The square root of 22324240 is about 4724.8534368803. The cubic root of 22324240 is about 281.5737907124.

Adding to 22324240 its reverse (4242322), we get a palindrome (26566562).

The spelling of 22324240 in words is "twenty-two million, three hundred twenty-four thousand, two hundred forty".