11871538 has 8 divisors (see below), whose sum is σ = 20351232. Its totient is φ = 5087796.

The previous prime is 11871511. The next prime is 11871551. The reversal of 11871538 is 83517811.

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

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 3 ways as a sum of consecutive naturals, for example, 423970 + ... + 423997.

It is an arithmetic number, because the mean of its divisors is an integer number (2543904).

Almost surely, 2^11871538 is an apocalyptic number.

11871538 is a deficient number, since it is larger than the sum of its proper divisors (8479694).

11871538 is an equidigital number, since it uses as much as digits as its factorization.

11871538 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 847976.

The product of its digits is 6720, while the sum is 34.

The square root of 11871538 is about 3445.5098316505. The cubic root of 11871538 is about 228.1229587107.

The spelling of 11871538 in words is "eleven million, eight hundred seventy-one thousand, five hundred thirty-eight".