22272540 has 48 divisors (see below), whose sum is σ = 62674080. Its totient is φ = 5909760.

The previous prime is 22272521. The next prime is 22272577. The reversal of 22272540 is 4527222.

It is a self number, because there is not a number n which added to its sum of digits gives 22272540.

It is a congruent number.

It is an unprimeable number.

It is a pernicious number, because its binary representation contains a prime number (13) of ones.

It is a polite number, since it can be written in 15 ways as a sum of consecutive naturals, for example, 12930 + ... + 14550.

It is an arithmetic number, because the mean of its divisors is an integer number (1305710).

Almost surely, 2^22272540 is an apocalyptic number.

22272540 is a gapful number since it is divisible by the number (20) formed by its first and last digit.

It is an amenable number.

22272540 is an abundant number, since it is smaller than the sum of its proper divisors (40401540).

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

22272540 is a wasteful number, since it uses less digits than its factorization.

22272540 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 1862 (or 1860 counting only the distinct ones).

The product of its (nonzero) digits is 2240, while the sum is 24.

The square root of 22272540 is about 4719.3791964622. The cubic root of 22272540 is about 281.3562600953.

Adding to 22272540 its reverse (4527222), we get a palindrome (26799762).

The spelling of 22272540 in words is "twenty-two million, two hundred seventy-two thousand, five hundred forty".