11388865 has 8 divisors (see below), whose sum is σ = 13792680. Its totient is φ = 9027072.

The previous prime is 11388863. The next prime is 11388869. The reversal of 11388865 is 56888311.

It can be written as a sum of positive squares in 4 ways, for example, as 2334784 + 9054081 = 1528^2 + 3009^2 .

It is a sphenic number, since it is the product of 3 distinct primes.

It is a cyclic number.

It is not a de Polignac number, because 11388865 - 2¹ = 11388863 is a prime.

It is not an unprimeable number, because it can be changed into a prime (11388863) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (13) of ones.

It is a polite number, since it can be written in 7 ways as a sum of consecutive naturals, for example, 9904 + ... + 10993.

It is an arithmetic number, because the mean of its divisors is an integer number (1724085).

Almost surely, 2^11388865 is an apocalyptic number.

It is an amenable number.

11388865 is a deficient number, since it is larger than the sum of its proper divisors (2403815).

11388865 is a wasteful number, since it uses less digits than its factorization.

11388865 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 21011.

The product of its digits is 46080, while the sum is 40.

The square root of 11388865 is about 3374.7392491865. The cubic root of 11388865 is about 224.9884109257.

The spelling of 11388865 in words is "eleven million, three hundred eighty-eight thousand, eight hundred sixty-five".