1115440 has 40 divisors (see below), whose sum is σ = 2642688. Its totient is φ = 437760.

The previous prime is 1115419. The next prime is 1115447. The reversal of 1115440 is 445111.

It is a tau number, because it is divible by the number of its divisors (40).

It is a Harshad number since it is a multiple of its sum of digits (16).

It is not an unprimeable number, because it can be changed into a prime (1115447) by changing a digit.

It is a polite number, since it can be written in 7 ways as a sum of consecutive naturals, for example, 5745 + ... + 5935.

2^1115440 is an apocalyptic number.

1115440 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 1115440, and also a Zumkeller number, because its divisors can be partitioned in two sets with the same sum (1321344).

1115440 is an abundant number, since it is smaller than the sum of its proper divisors (1527248).

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

1115440 is a wasteful number, since it uses less digits than its factorization.

1115440 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 277 (or 271 counting only the distinct ones).

The product of its (nonzero) digits is 80, while the sum is 16.

The square root of 1115440 is about 1056.1439295854. The cubic root of 1115440 is about 103.7087512031.

It can be divided in two parts, 11 and 15440, that added together give a palindrome (15451).

The spelling of 1115440 in words is "one million, one hundred fifteen thousand, four hundred forty".