11438391 has 4 divisors (see below), whose sum is σ = 15251192. Its totient is φ = 7625592.

The previous prime is 11438359. The next prime is 11438393. The reversal of 11438391 is 19383411.

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

It is not a de Polignac number, because 11438391 - 2⁵ = 11438359 is a prime.

It is a Duffinian number.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (11438393) by changing a digit.

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, 1906396 + ... + 1906401.

It is an arithmetic number, because the mean of its divisors is an integer number (3812798).

Almost surely, 2^11438391 is an apocalyptic number.

11438391 is a deficient number, since it is larger than the sum of its proper divisors (3812801).

11438391 is an equidigital number, since it uses as much as digits as its factorization.

11438391 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 3812800.

The product of its digits is 2592, while the sum is 30.

The square root of 11438391 is about 3382.0690412823. The cubic root of 11438391 is about 225.3140700380.

The spelling of 11438391 in words is "eleven million, four hundred thirty-eight thousand, three hundred ninety-one".