11518839 has 6 divisors (see below), whose sum is σ = 16638336. Its totient is φ = 7679220.

The previous prime is 11518817. The next prime is 11518853. The reversal of 11518839 is 93881511.

It is not a de Polignac number, because 11518839 - 2⁸ = 11518583 is a prime.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (11518739) by changing a digit.

It is a polite number, since it can be written in 5 ways as a sum of consecutive naturals, for example, 639927 + ... + 639944.

It is an arithmetic number, because the mean of its divisors is an integer number (2773056).

Almost surely, 2^11518839 is an apocalyptic number.

11518839 is a deficient number, since it is larger than the sum of its proper divisors (5119497).

11518839 is a wasteful number, since it uses less digits than its factorization.

11518839 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 1279877 (or 1279874 counting only the distinct ones).

The product of its digits is 8640, while the sum is 36.

The square root of 11518839 is about 3393.9415139333. The cubic root of 11518839 is about 225.8410595736.

The spelling of 11518839 in words is "eleven million, five hundred eighteen thousand, eight hundred thirty-nine".