11440639 has 8 divisors (see below), whose sum is σ = 13104288. Its totient is φ = 9784320.

The previous prime is 11440607. The next prime is 11440651. The reversal of 11440639 is 93604411.

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

It is not a de Polignac number, because 11440639 - 2⁵ = 11440607 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 (11440699) 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, 2079 + ... + 5215.

It is an arithmetic number, because the mean of its divisors is an integer number (1638036).

Almost surely, 2^11440639 is an apocalyptic number.

11440639 is a deficient number, since it is larger than the sum of its proper divisors (1663649).

11440639 is an equidigital number, since it uses as much as digits as its factorization.

11440639 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 3665.

The product of its (nonzero) digits is 2592, while the sum is 28.

The square root of 11440639 is about 3382.4013658938. The cubic root of 11440639 is about 225.3288294814.

The spelling of 11440639 in words is "eleven million, four hundred forty thousand, six hundred thirty-nine".