11388839 has 16 divisors (see below), whose sum is σ = 14273280. Its totient is φ = 8828160.

The previous prime is 11388823. The next prime is 11388863. The reversal of 11388839 is 93888311.

It is a happy number.

It is not a de Polignac number, because 11388839 - 2⁴ = 11388823 is a prime.

It is a junction number, because it is equal to n+sod(n) for n = 11388796 and 11388805.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (11388869) by changing a digit.

It is a polite number, since it can be written in 15 ways as a sum of consecutive naturals, for example, 26972 + ... + 27390.

It is an arithmetic number, because the mean of its divisors is an integer number (892080).

Almost surely, 2^11388839 is an apocalyptic number.

11388839 is a deficient number, since it is larger than the sum of its proper divisors (2884441).

11388839 is a wasteful number, since it uses less digits than its factorization.

11388839 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 790.

The product of its digits is 41472, while the sum is 41.

The square root of 11388839 is about 3374.7353970349. The cubic root of 11388839 is about 224.9882397145.

The spelling of 11388839 in words is "eleven million, three hundred eighty-eight thousand, eight hundred thirty-nine".