11142040 has 64 divisors (see below), whose sum is σ = 30864960. Its totient is φ = 3525120.

The previous prime is 11142029. The next prime is 11142049. The reversal of 11142040 is 4024111.

It is a Harshad number since it is a multiple of its sum of digits (13).

It is a self number, because there is not a number n which added to its sum of digits gives 11142040.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (11142049) by changing a digit.

It is a polite number, since it can be written in 15 ways as a sum of consecutive naturals, for example, 2110 + ... + 5170.

It is an arithmetic number, because the mean of its divisors is an integer number (482265).

Almost surely, 2^11142040 is an apocalyptic number.

11142040 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 11142040, and also a Zumkeller number, because its divisors can be partitioned in two sets with the same sum (15432480).

11142040 is an abundant number, since it is smaller than the sum of its proper divisors (19722920).

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

11142040 is a wasteful number, since it uses less digits than its factorization.

11142040 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 3092 (or 3088 counting only the distinct ones).

The product of its (nonzero) digits is 32, while the sum is 13.

The square root of 11142040 is about 3337.9694426402. The cubic root of 11142040 is about 223.3511730508.

Adding to 11142040 its reverse (4024111), we get a palindrome (15166151).

The spelling of 11142040 in words is "eleven million, one hundred forty-two thousand, forty".