22008740 has 24 divisors (see below), whose sum is σ = 49774200. Its totient is φ = 8126208.

The previous prime is 22008713. The next prime is 22008751. The reversal of 22008740 is 4780022.

It can be written as a sum of positive squares in 4 ways, for example, as 87616 + 21921124 = 296^2 + 4682^2 .

It is an unprimeable number.

It is a polite number, since it can be written in 7 ways as a sum of consecutive naturals, for example, 42065 + ... + 42584.

It is an arithmetic number, because the mean of its divisors is an integer number (2073925).

Almost surely, 2^22008740 is an apocalyptic number.

22008740 is a gapful number since it is divisible by the number (20) formed by its first and last digit.

It is an amenable number.

22008740 is an abundant number, since it is smaller than the sum of its proper divisors (27765460).

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

22008740 is a wasteful number, since it uses less digits than its factorization.

22008740 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 84671 (or 84669 counting only the distinct ones).

The product of its (nonzero) digits is 896, while the sum is 23.

The square root of 22008740 is about 4691.3473544388. The cubic root of 22008740 is about 280.2410339465.

Adding to 22008740 its reverse (4780022), we get a palindrome (26788762).

The spelling of 22008740 in words is "twenty-two million, eight thousand, seven hundred forty".