11805870 has 32 divisors (see below), whose sum is σ = 28633248. Its totient is φ = 3115008.

The previous prime is 11805863. The next prime is 11805881. The reversal of 11805870 is 7850811.

It is a Harshad number since it is a multiple of its sum of digits (30).

It is a congruent number.

It is an unprimeable number.

It is a pernicious number, because its binary representation contains a prime number (11) of ones.

It is a polite number, since it can be written in 15 ways as a sum of consecutive naturals, for example, 882 + ... + 4938.

It is an arithmetic number, because the mean of its divisors is an integer number (894789).

Almost surely, 2^11805870 is an apocalyptic number.

11805870 is a gapful number since it is divisible by the number (10) formed by its first and last digit.

11805870 is an abundant number, since it is smaller than the sum of its proper divisors (16827378).

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

11805870 is a wasteful number, since it uses less digits than its factorization.

11805870 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 4164.

The product of its (nonzero) digits is 2240, while the sum is 30.

The square root of 11805870 is about 3435.9671127646. The cubic root of 11805870 is about 227.7015562713.

The spelling of 11805870 in words is "eleven million, eight hundred five thousand, eight hundred seventy".