13439744 has 36 divisors (see below), whose sum is σ = 27422304. Its totient is φ = 6571008.

The previous prime is 13439743. The next prime is 13439753. The reversal of 13439744 is 44793431.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (13439743) by changing a digit.

It is a polite number, since it can be written in 3 ways as a sum of consecutive naturals, for example, 11474 + ... + 12590.

Almost surely, 2^13439744 is an apocalyptic number.

It is an amenable number.

It is a practical number, because each smaller number is the sum of distinct divisors of 13439744, and also a Zumkeller number, because its divisors can be partitioned in two sets with the same sum (13711152).

13439744 is an abundant number, since it is smaller than the sum of its proper divisors (13982560).

It is a pseudoperfect number, because it is the sum of a subset of its proper divisors.

13439744 is an equidigital number, since it uses as much as digits as its factorization.

13439744 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 1180 (or 1166 counting only the distinct ones).

The product of its digits is 36288, while the sum is 35.

The square root of 13439744 is about 3666.0256409360. The cubic root of 13439744 is about 237.7553685335.

The spelling of 13439744 in words is "thirteen million, four hundred thirty-nine thousand, seven hundred forty-four".