1111445440 has 168 divisors, whose sum is σ = 3124120752. Its totient is φ = 375459840.

The previous prime is 1111445389. The next prime is 1111445477. The reversal of 1111445440 is 445441111.

It is a congruent number.

It is an unprimeable number.

It is a polite number, since it can be written in 23 ways as a sum of consecutive naturals, for example, 1144155 + ... + 1145125.

Almost surely, 2^1111445440 is an apocalyptic number.

1111445440 is a gapful number since it is divisible by the number (10) formed by its first and last digit.

It is an amenable number.

It is a practical number, because each smaller number is the sum of distinct divisors of 1111445440, and also a Zumkeller number, because its divisors can be partitioned in two sets with the same sum (1562060376).

1111445440 is an abundant number, since it is smaller than the sum of its proper divisors (2012675312).

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

1111445440 is an equidigital number, since it uses as much as digits as its factorization.

1111445440 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 1075 (or 1058 counting only the distinct ones).

The product of its (nonzero) digits is 1280, while the sum is 25.

The square root of 1111445440 is about 33338.3478894801. The cubic root of 1111445440 is about 1035.8480419927.

Adding to 1111445440 its reverse (445441111), we get a palindrome (1556886551).

The spelling of 1111445440 in words is "one billion, one hundred eleven million, four hundred forty-five thousand, four hundred forty".