11639855 has 8 divisors (see below), whose sum is σ = 13986432. Its totient is φ = 9299488.

The previous prime is 11639851. The next prime is 11639869. The reversal of 11639855 is 55893611.

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 11639855 - 2² = 11639851 is a prime.

It is a Duffinian number.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (11639851) 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, 5474 + ... + 7296.

It is an arithmetic number, because the mean of its divisors is an integer number (1748304).

Almost surely, 2^11639855 is an apocalyptic number.

11639855 is a deficient number, since it is larger than the sum of its proper divisors (2346577).

11639855 is a wasteful number, since it uses less digits than its factorization.

11639855 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 3105.

The product of its digits is 32400, while the sum is 38.

The square root of 11639855 is about 3411.7231716539. The cubic root of 11639855 is about 226.6291953148.

The spelling of 11639855 in words is "eleven million, six hundred thirty-nine thousand, eight hundred fifty-five".