22026440 has 16 divisors (see below), whose sum is σ = 49559580. Its totient is φ = 8810560.

The previous prime is 22026439. The next prime is 22026443. The reversal of 22026440 is 4462022.

It can be written as a sum of positive squares in 2 ways, for example, as 21696964 + 329476 = 4658^2 + 574^2 .

It is a Harshad number since it is a multiple of its sum of digits (20).

It is not an unprimeable number, because it can be changed into a prime (22026443) 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, 275291 + ... + 275370.

Almost surely, 2^22026440 is an apocalyptic number.

22026440 is a gapful number since it is divisible by the number (20) formed by its first and last digit.

It is an amenable number.

22026440 is an abundant number, since it is smaller than the sum of its proper divisors (27533140).

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

22026440 is a wasteful number, since it uses less digits than its factorization.

22026440 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 550672 (or 550668 counting only the distinct ones).

The product of its (nonzero) digits is 768, while the sum is 20.

The square root of 22026440 is about 4693.2334269670. The cubic root of 22026440 is about 280.3161395207.

Adding to 22026440 its reverse (4462022), we get a palindrome (26488462).

The spelling of 22026440 in words is "twenty-two million, twenty-six thousand, four hundred forty".