11408639 has 8 divisors (see below), whose sum is σ = 12711168. Its totient is φ = 10150360.

The previous prime is 11408633. The next prime is 11408669. The reversal of 11408639 is 93680411.

It is a happy number.

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

It is not a de Polignac number, because 11408639 - 2⁴ = 11408623 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 (11408633) by changing a digit.

It is a polite number, since it can be written in 7 ways as a sum of consecutive naturals, for example, 10517 + ... + 11550.

It is an arithmetic number, because the mean of its divisors is an integer number (1588896).

Almost surely, 2^11408639 is an apocalyptic number.

11408639 is a deficient number, since it is larger than the sum of its proper divisors (1302529).

11408639 is a wasteful number, since it uses less digits than its factorization.

11408639 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 22125.

The product of its (nonzero) digits is 5184, while the sum is 32.

The square root of 11408639 is about 3377.6676864369. The cubic root of 11408639 is about 225.1185482278.

It can be divided in two parts, 1140 and 8639, that added together give a palindrome (9779).

The spelling of 11408639 in words is "eleven million, four hundred eight thousand, six hundred thirty-nine".