11081138 has 12 divisors (see below), whose sum is σ = 16910010. Its totient is φ = 5446080.

The previous prime is 11081137. The next prime is 11081153. The reversal of 11081138 is 83118011.

11081138 = T₅₇₂ + T₅₇₃ + ... + T₆₃₂.

It can be written as a sum of positive squares in 3 ways, for example, as 1857769 + 9223369 = 1363^2 + 3037^2 .

It is not an unprimeable number, because it can be changed into a prime (11081137) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (11) of ones.

It is a polite number, since it can be written in 5 ways as a sum of consecutive naturals, for example, 6698 + ... + 8186.

Almost surely, 2^11081138 is an apocalyptic number.

11081138 is a deficient number, since it is larger than the sum of its proper divisors (5828872).

11081138 is an equidigital number, since it uses as much as digits as its factorization.

11081138 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 1613 (or 1552 counting only the distinct ones).

The product of its (nonzero) digits is 192, while the sum is 23.

The square root of 11081138 is about 3328.8343305127. The cubic root of 11081138 is about 222.9434861182.

Adding to 11081138 its reverse (83118011), we get a palindrome (94199149).

The spelling of 11081138 in words is "eleven million, eighty-one thousand, one hundred thirty-eight".