11855385 has 24 divisors (see below), whose sum is σ = 20746440. Its totient is φ = 6262272.

The previous prime is 11855383. The next prime is 11855387. The reversal of 11855385 is 58355811.

11855385 is a `hidden beast` number, since 118 + 5 + 538 + 5 = 666.

11855385 is digitally balanced in base 2, because in such base it contains all the possibile digits an equal number of times.

It is an interprime number because it is at equal distance from previous prime (11855383) and next prime (11855387).

It can be written as a sum of positive squares in 4 ways, for example, as 5322249 + 6533136 = 2307^2 + 2556^2 .

It is not a de Polignac number, because 11855385 - 2¹ = 11855383 is a prime.

It is not an unprimeable number, because it can be changed into a prime (11855381) by changing a digit.

It is a polite number, since it can be written in 23 ways as a sum of consecutive naturals, for example, 3697 + ... + 6113.

It is an arithmetic number, because the mean of its divisors is an integer number (864435).

Almost surely, 2^11855385 is an apocalyptic number.

11855385 is a gapful number since it is divisible by the number (15) formed by its first and last digit.

It is an amenable number.

11855385 is a deficient number, since it is larger than the sum of its proper divisors (8891055).

11855385 is a wasteful number, since it uses less digits than its factorization.

11855385 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 2537 (or 2534 counting only the distinct ones).

The product of its digits is 24000, while the sum is 36.

The square root of 11855385 is about 3443.1649684556. The cubic root of 11855385 is about 228.0194466331.

The spelling of 11855385 in words is "eleven million, eight hundred fifty-five thousand, three hundred eighty-five".