11611138 has 24 divisors (see below), whose sum is σ = 22104144. Its totient is φ = 4523400.

The previous prime is 11611133. The next prime is 11611151. The reversal of 11611138 is 83111611.

It is a Harshad number since it is a multiple of its sum of digits (22).

It is not an unprimeable number, because it can be changed into a prime (11611133) by changing a digit.

It is a polite number, since it can be written in 11 ways as a sum of consecutive naturals, for example, 4308 + ... + 6463.

It is an arithmetic number, because the mean of its divisors is an integer number (921006).

Almost surely, 2^11611138 is an apocalyptic number.

11611138 is a deficient number, since it is larger than the sum of its proper divisors (10493006).

11611138 is a wasteful number, since it uses less digits than its factorization.

11611138 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 10798 (or 10791 counting only the distinct ones).

The product of its digits is 144, while the sum is 22.

The square root of 11611138 is about 3407.5119955768. The cubic root of 11611138 is about 226.4426675026.

Adding to 11611138 its reverse (83111611), we get a palindrome (94722749).

The spelling of 11611138 in words is "eleven million, six hundred eleven thousand, one hundred thirty-eight".