22323840 has 256 divisors, whose sum is σ = 89303040. Its totient is φ = 4608000.

The previous prime is 22323809. The next prime is 22323853. The reversal of 22323840 is 4832322.

It is a super-3 number, since 3×22323840³ (a number of 23 digits) contains 333 as substring.

It is a Harshad number since it is a multiple of its sum of digits (24).

It is a self number, because there is not a number n which added to its sum of digits gives 22323840.

It is an unprimeable number.

It is a polite number, since it can be written in 31 ways as a sum of consecutive naturals, for example, 147765 + ... + 147915.

It is an arithmetic number, because the mean of its divisors is an integer number (348840).

Almost surely, 2^22323840 is an apocalyptic number.

22323840 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 22323840, and also a Zumkeller number, because its divisors can be partitioned in two sets with the same sum (44651520).

22323840 is an abundant number, since it is smaller than the sum of its proper divisors (66979200).

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

22323840 is a wasteful number, since it uses less digits than its factorization.

22323840 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 191 (or 179 counting only the distinct ones).

The product of its (nonzero) digits is 2304, while the sum is 24.

The square root of 22323840 is about 4724.8111073354. The cubic root of 22323840 is about 281.5721089801.

The spelling of 22323840 in words is "twenty-two million, three hundred twenty-three thousand, eight hundred forty".