11540138 has 8 divisors (see below), whose sum is σ = 17410788. Its totient is φ = 5736544.

The previous prime is 11540131. The next prime is 11540141. The reversal of 11540138 is 83104511.

It can be written as a sum of positive squares in 2 ways, for example, as 11539609 + 529 = 3397^2 + 23^2 .

It is a sphenic number, since it is the product of 3 distinct primes.

It is not an unprimeable number, because it can be changed into a prime (11540131) 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, 16331 + ... + 17022.

Almost surely, 2^11540138 is an apocalyptic number.

11540138 is a deficient number, since it is larger than the sum of its proper divisors (5870650).

11540138 is a wasteful number, since it uses less digits than its factorization.

11540138 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 33528.

The product of its (nonzero) digits is 480, while the sum is 23.

The square root of 11540138 is about 3397.0778619278. The cubic root of 11540138 is about 225.9801715968.

Adding to 11540138 its reverse (83104511), we get a palindrome (94644649).

The spelling of 11540138 in words is "eleven million, five hundred forty thousand, one hundred thirty-eight".