22027540 has 12 divisors (see below), whose sum is σ = 46257876. Its totient is φ = 8811008.

The previous prime is 22027507. The next prime is 22027547. The reversal of 22027540 is 4572022.

It can be written as a sum of positive squares in 2 ways, for example, as 13927824 + 8099716 = 3732^2 + 2846^2 .

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (22027547) 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, 550669 + ... + 550708.

It is an arithmetic number, because the mean of its divisors is an integer number (3854823).

Almost surely, 2^22027540 is an apocalyptic number.

22027540 is a gapful number since it is divisible by the number (20) formed by its first and last digit.

It is an amenable number.

22027540 is an abundant number, since it is smaller than the sum of its proper divisors (24230336).

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

22027540 is a wasteful number, since it uses less digits than its factorization.

22027540 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 1101386 (or 1101384 counting only the distinct ones).

The product of its (nonzero) digits is 1120, while the sum is 22.

The square root of 22027540 is about 4693.3506154985. The cubic root of 22027540 is about 280.3208057706.

Adding to 22027540 its reverse (4572022), we get a palindrome (26599562).

The spelling of 22027540 in words is "twenty-two million, twenty-seven thousand, five hundred forty".