11439855 has 48 divisors (see below), whose sum is σ = 23662080. Its totient is φ = 4999104.

The previous prime is 11439853. The next prime is 11439859. The reversal of 11439855 is 55893411.

It is not a de Polignac number, because 11439855 - 2¹ = 11439853 is a prime.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (11439851) by changing a digit.

It is a polite number, since it can be written in 47 ways as a sum of consecutive naturals, for example, 6456 + ... + 8034.

It is an arithmetic number, because the mean of its divisors is an integer number (492960).

Almost surely, 2^11439855 is an apocalyptic number.

11439855 is a gapful number since it is divisible by the number (15) formed by its first and last digit.

11439855 is an abundant number, since it is smaller than the sum of its proper divisors (12222225).

It is a pseudoperfect number, because it is the sum of a subset of its proper divisors.

11439855 is a wasteful number, since it uses less digits than its factorization.

11439855 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 1620 (or 1617 counting only the distinct ones).

The product of its digits is 21600, while the sum is 36.

The square root of 11439855 is about 3382.2854699153. The cubic root of 11439855 is about 225.3236822794.

The spelling of 11439855 in words is "eleven million, four hundred thirty-nine thousand, eight hundred fifty-five".