11971438 has 4 divisors (see below), whose sum is σ = 17957160. Its totient is φ = 5985718.

The previous prime is 11971411. The next prime is 11971439. The reversal of 11971438 is 83417911.

It is a semiprime because it is the product of two primes.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (11971439) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 2992858 + ... + 2992861.

It is an arithmetic number, because the mean of its divisors is an integer number (4489290).

Almost surely, 2^11971438 is an apocalyptic number.

11971438 is a deficient number, since it is larger than the sum of its proper divisors (5985722).

11971438 is an equidigital number, since it uses as much as digits as its factorization.

11971438 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 5985721.

The product of its digits is 6048, while the sum is 34.

The square root of 11971438 is about 3459.9765895162. The cubic root of 11971438 is about 228.7610634959.

The spelling of 11971438 in words is "eleven million, nine hundred seventy-one thousand, four hundred thirty-eight".