11871838 has 8 divisors (see below), whose sum is σ = 19426680. Its totient is φ = 5396280.

The previous prime is 11871829. The next prime is 11871907. The reversal of 11871838 is 83817811.

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

It is a junction number, because it is equal to n+sod(n) for n = 11871797 and 11871806.

It is a congruent number.

It is an unprimeable number.

It is a pernicious number, because its binary representation contains a prime number (13) of ones.

It is a polite number, since it can be written in 3 ways as a sum of consecutive naturals, for example, 269793 + ... + 269836.

It is an arithmetic number, because the mean of its divisors is an integer number (2428335).

Almost surely, 2^11871838 is an apocalyptic number.

11871838 is a deficient number, since it is larger than the sum of its proper divisors (7554842).

11871838 is a wasteful number, since it uses less digits than its factorization.

11871838 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 539642.

The product of its digits is 10752, while the sum is 37.

The square root of 11871838 is about 3445.5533662969. The cubic root of 11871838 is about 228.1248802902.

It can be divided in two parts, 1187 and 1838, that added together give a square (3025 = 55²).

The spelling of 11871838 in words is "eleven million, eight hundred seventy-one thousand, eight hundred thirty-eight".