11805538 has 8 divisors (see below), whose sum is σ = 18042588. Its totient is φ = 5791344.

The previous prime is 11805533. The next prime is 11805641. The reversal of 11805538 is 83550811.

It can be written as a sum of positive squares in 2 ways, for example, as 9653449 + 2152089 = 3107^2 + 1467^2 .

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

It is not an unprimeable number, because it can be changed into a prime (11805533) by changing a digit.

It is a polite number, since it can be written in 3 ways as a sum of consecutive naturals, for example, 55581 + ... + 55792.

Almost surely, 2^11805538 is an apocalyptic number.

11805538 is a deficient number, since it is larger than the sum of its proper divisors (6237050).

11805538 is a wasteful number, since it uses less digits than its factorization.

11805538 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 111428.

The product of its (nonzero) digits is 4800, while the sum is 31.

The square root of 11805538 is about 3435.9187999719. The cubic root of 11805538 is about 227.6994218069.

The spelling of 11805538 in words is "eleven million, eight hundred five thousand, five hundred thirty-eight".