22103440 has 20 divisors (see below), whose sum is σ = 51390684. Its totient is φ = 8841344.

The previous prime is 22103407. The next prime is 22103447. The reversal of 22103440 is 4430122.

It can be written as a sum of positive squares in 2 ways, for example, as 5161984 + 16941456 = 2272^2 + 4116^2 .

It is a tau number, because it is divible by the number of its divisors (20).

It is a Harshad number since it is a multiple of its sum of digits (16).

It is not an unprimeable number, because it can be changed into a prime (22103447) by changing a digit.

It is a polite number, since it can be written in 3 ways as a sum of consecutive naturals, for example, 138067 + ... + 138226.

Almost surely, 2^22103440 is an apocalyptic number.

22103440 is a gapful number since it is divisible by the number (20) formed by its first and last digit.

It is an amenable number.

22103440 is an abundant number, since it is smaller than the sum of its proper divisors (29287244).

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

22103440 is a wasteful number, since it uses less digits than its factorization.

22103440 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 276306 (or 276300 counting only the distinct ones).

The product of its (nonzero) digits is 192, while the sum is 16.

The square root of 22103440 is about 4701.4295698224. The cubic root of 22103440 is about 280.6424025630.

Adding to 22103440 its reverse (4430122), we get a palindrome (26533562).

The spelling of 22103440 in words is "twenty-two million, one hundred three thousand, four hundred forty".