22011440 has 40 divisors (see below), whose sum is σ = 55831248. Its totient is φ = 8003840.

The previous prime is 22011439. The next prime is 22011461. The reversal of 22011440 is 4411022.

It is a tau number, because it is divible by the number of its divisors (40).

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, 11627 + ... + 13386.

Almost surely, 2^22011440 is an apocalyptic number.

22011440 is a gapful number since it is divisible by the number (20) formed by its first and last digit.

It is an amenable number.

22011440 is an abundant number, since it is smaller than the sum of its proper divisors (33819808).

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

22011440 is a wasteful number, since it uses less digits than its factorization.

22011440 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 25037 (or 25031 counting only the distinct ones).

The product of its (nonzero) digits is 64, while the sum is 14.

The square root of 22011440 is about 4691.6351094261. The cubic root of 22011440 is about 280.2524933311.

Adding to 22011440 its reverse (4411022), we get a palindrome (26422462).

The spelling of 22011440 in words is "twenty-two million, eleven thousand, four hundred forty".