11689538 has 24 divisors (see below), whose sum is σ = 20616444. Its totient is φ = 4956000.

The previous prime is 11689537. The next prime is 11689547. The reversal of 11689538 is 83598611.

It can be written as a sum of positive squares in 2 ways, for example, as 8602489 + 3087049 = 2933^2 + 1757^2 .

It is a super-3 number, since 3×11689538³ (a number of 22 digits) contains 333 as substring.

It is a junction number, because it is equal to n+sod(n) for n = 11689495 and 11689504.

It is not an unprimeable number, because it can be changed into a prime (11689537) 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 11 ways as a sum of consecutive naturals, for example, 9308 + ... + 10488.

Almost surely, 2^11689538 is an apocalyptic number.

11689538 is a deficient number, since it is larger than the sum of its proper divisors (8926906).

11689538 is a wasteful number, since it uses less digits than its factorization.

11689538 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 1298 (or 1291 counting only the distinct ones).

The product of its digits is 51840, while the sum is 41.

The square root of 11689538 is about 3418.9966364417. The cubic root of 11689538 is about 226.9511820345.

The spelling of 11689538 in words is "eleven million, six hundred eighty-nine thousand, five hundred thirty-eight".