11009138 has 16 divisors (see below), whose sum is σ = 19042560. Its totient is φ = 4675776.

The previous prime is 11009137. The next prime is 11009143. The reversal of 11009138 is 83190011.

It is a super-2 number, since 2×11009138² = 242402239006088, which contains 22 as substring.

It is not an unprimeable number, because it can be changed into a prime (11009137) by changing a digit.

It is a polite number, since it can be written in 7 ways as a sum of consecutive naturals, for example, 1898 + ... + 5061.

It is an arithmetic number, because the mean of its divisors is an integer number (1190160).

Almost surely, 2^11009138 is an apocalyptic number.

11009138 is a deficient number, since it is larger than the sum of its proper divisors (8033422).

11009138 is a wasteful number, since it uses less digits than its factorization.

11009138 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 7081.

The product of its (nonzero) digits is 216, while the sum is 23.

The square root of 11009138 is about 3318.0021097040. The cubic root of 11009138 is about 222.4595760421.

Adding to 11009138 its reverse (83190011), we get a palindrome (94199149).

The spelling of 11009138 in words is "eleven million, nine thousand, one hundred thirty-eight".