11543380 has 12 divisors (see below), whose sum is σ = 24241140. Its totient is φ = 4617344.

The previous prime is 11543353. The next prime is 11543381. The reversal of 11543380 is 8334511.

It can be written as a sum of positive squares in 2 ways, for example, as 5373124 + 6170256 = 2318^2 + 2484^2 .

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (11543381) by changing a digit.

It is a polite number, since it can be written in 3 ways as a sum of consecutive naturals, for example, 288565 + ... + 288604.

It is an arithmetic number, because the mean of its divisors is an integer number (2020095).

Almost surely, 2^11543380 is an apocalyptic number.

11543380 is a gapful number since it is divisible by the number (10) formed by its first and last digit.

It is an amenable number.

11543380 is an abundant number, since it is smaller than the sum of its proper divisors (12697760).

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

11543380 is a wasteful number, since it uses less digits than its factorization.

11543380 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 577178 (or 577176 counting only the distinct ones).

The product of its (nonzero) digits is 1440, while the sum is 25.

The square root of 11543380 is about 3397.5550032339. Note that the first 3 decimals coincide. The cubic root of 11543380 is about 226.0013313415.

Adding to 11543380 its reverse (8334511), we get a palindrome (19877891).

The spelling of 11543380 in words is "eleven million, five hundred forty-three thousand, three hundred eighty".