1111443540 has 24 divisors (see below), whose sum is σ = 3112042080. Its totient is φ = 296384928.

The previous prime is 1111443521. The next prime is 1111443547. The reversal of 1111443540 is 453441111.

It is a happy number.

It is a self number, because there is not a number n which added to its sum of digits gives 1111443540.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (1111443547) by changing a digit.

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 7 ways as a sum of consecutive naturals, for example, 9261970 + ... + 9262089.

It is an arithmetic number, because the mean of its divisors is an integer number (129668420).

Almost surely, 2^1111443540 is an apocalyptic number.

1111443540 is a gapful number since it is divisible by the number (10) formed by its first and last digit.

It is an amenable number.

1111443540 is an abundant number, since it is smaller than the sum of its proper divisors (2000598540).

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

1111443540 is a wasteful number, since it uses less digits than its factorization.

1111443540 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 18524071 (or 18524069 counting only the distinct ones).

The product of its (nonzero) digits is 960, while the sum is 24.

The square root of 1111443540 is about 33338.3193937547. The cubic root of 1111443540 is about 1035.8474517366.

Adding to 1111443540 its reverse (453441111), we get a palindrome (1564884651).

The spelling of 1111443540 in words is "one billion, one hundred eleven million, four hundred forty-three thousand, five hundred forty".