22043040 has 96 divisors (see below), whose sum is σ = 73120320. Its totient is φ = 5566464.

The previous prime is 22043027. The next prime is 22043041. The reversal of 22043040 is 4034022.

It is a happy number.

It is a tau number, because it is divible by the number of its divisors (96).

It is a super-2 number, since 2×22043040² = 971791224883200, which contains 22 as substring.

It is a Harshad number since it is a multiple of its sum of digits (15).

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (22043041) by changing a digit.

It is a polite number, since it can be written in 15 ways as a sum of consecutive naturals, for example, 7912 + ... + 10328.

It is an arithmetic number, because the mean of its divisors is an integer number (761670).

Almost surely, 2^22043040 is an apocalyptic number.

22043040 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 22043040, and also a Zumkeller number, because its divisors can be partitioned in two sets with the same sum (36560160).

22043040 is an abundant number, since it is smaller than the sum of its proper divisors (51077280).

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

22043040 is a wasteful number, since it uses less digits than its factorization.

22043040 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 2454 (or 2446 counting only the distinct ones).

The product of its (nonzero) digits is 192, while the sum is 15.

The square root of 22043040 is about 4695.0015974438. The cubic root of 22043040 is about 280.3865409632.

Subtracting from 22043040 its sum of digits (15), we obtain a square (22043025 = 4695²).

Adding to 22043040 its reverse (4034022), we get a palindrome (26077062).

The spelling of 22043040 in words is "twenty-two million, forty-three thousand, forty".