13439844 has 84 divisors (see below), whose sum is σ = 38561040. Its totient is φ = 4062960.

The previous prime is 13439831. The next prime is 13439869. The reversal of 13439844 is 44893431.

It is a Harshad number since it is a multiple of its sum of digits (36).

It is a junction number, because it is equal to n+sod(n) for n = 13439799 and 13439808.

It is an unprimeable number.

It is a pernicious number, because its binary representation contains a prime number (11) of ones.

It is a polite number, since it can be written in 27 ways as a sum of consecutive naturals, for example, 31867 + ... + 32285.

It is an arithmetic number, because the mean of its divisors is an integer number (459060).

Almost surely, 2^13439844 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 13439844, and also a Zumkeller number, because its divisors can be partitioned in two sets with the same sum (19280520).

13439844 is an abundant number, since it is smaller than the sum of its proper divisors (25121196).

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

13439844 is a wasteful number, since it uses less digits than its factorization.

13439844 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 452 (or 435 counting only the distinct ones).

The product of its digits is 41472, while the sum is 36.

The square root of 13439844 is about 3666.0392796586. The cubic root of 13439844 is about 237.7559582143.

The spelling of 13439844 in words is "thirteen million, four hundred thirty-nine thousand, eight hundred forty-four".