1115043440 has 80 divisors (see below), whose sum is σ = 2969994432. Its totient is φ = 381376512.

The previous prime is 1115043439. The next prime is 1115043451. The reversal of 1115043440 is 443405111.

It is a tau number, because it is divible by the number of its divisors (80).

It is a congruent number.

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, 253742 + ... + 258098.

Almost surely, 2^1115043440 is an apocalyptic number.

1115043440 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 1115043440, and also a Zumkeller number, because its divisors can be partitioned in two sets with the same sum (1484997216).

1115043440 is an abundant number, since it is smaller than the sum of its proper divisors (1854950992).

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

1115043440 is a wasteful number, since it uses less digits than its factorization.

1115043440 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 4834 (or 4828 counting only the distinct ones).

The product of its (nonzero) digits is 960, while the sum is 23.

The square root of 1115043440 is about 33392.2661704773. The cubic root of 1115043440 is about 1036.9645960598.

Adding to 1115043440 its reverse (443405111), we get a palindrome (1558448551).

The spelling of 1115043440 in words is "one billion, one hundred fifteen million, forty-three thousand, four hundred forty".