11115032440 has 64 divisors (see below), whose sum is σ = 26149132800. Its totient is φ = 4244076672.

The previous prime is 11115032431. The next prime is 11115032477. The reversal of 11115032440 is 4423051111.

It is a super-2 number, since 2×11115032440² (a number of 21 digits) contains 22 as substring.

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, 450751 + ... + 474769.

It is an arithmetic number, because the mean of its divisors is an integer number (408580200).

Almost surely, 2^11115032440 is an apocalyptic number.

11115032440 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 11115032440, and also a Zumkeller number, because its divisors can be partitioned in two sets with the same sum (13074566400).

11115032440 is an abundant number, since it is smaller than the sum of its proper divisors (15034100360).

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

11115032440 is a wasteful number, since it uses less digits than its factorization.

11115032440 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 24556 (or 24552 counting only the distinct ones).

The product of its (nonzero) digits is 480, while the sum is 22.

Adding to 11115032440 its reverse (4423051111), we get a palindrome (15538083551).

The spelling of 11115032440 in words is "eleven billion, one hundred fifteen million, thirty-two thousand, four hundred forty".