11005540 has 48 divisors (see below), whose sum is σ = 28449792. Its totient is φ = 3482496.

The previous prime is 11005537. The next prime is 11005571. The reversal of 11005540 is 4550011.

It is a happy number.

It is a super-2 number, since 2×11005540² = 242243821383200, which contains 22 as substring.

It is an unprimeable number.

It is a polite number, since it can be written in 15 ways as a sum of consecutive naturals, for example, 1204 + ... + 4843.

It is an arithmetic number, because the mean of its divisors is an integer number (592704).

Almost surely, 2^11005540 is an apocalyptic number.

11005540 is a gapful number since it is divisible by the number (10) formed by its first and last digit.

It is an amenable number.

11005540 is an abundant number, since it is smaller than the sum of its proper divisors (17444252).

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

11005540 is a wasteful number, since it uses less digits than its factorization.

11005540 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 6076 (or 6074 counting only the distinct ones).

The product of its (nonzero) digits is 100, while the sum is 16.

The square root of 11005540 is about 3317.4598716488. The cubic root of 11005540 is about 222.4353386990.

Adding to 11005540 its reverse (4550011), we get a palindrome (15555551).

The spelling of 11005540 in words is "eleven million, five thousand, five hundred forty".