13120344 has 48 divisors (see below), whose sum is σ = 35802000. Its totient is φ = 4340544.

The previous prime is 13120339. The next prime is 13120351. The reversal of 13120344 is 44302131.

13120344 = T₁₃₅ + T₁₃₆ + ... + T₄₃₂.

It is a Harshad number since it is a multiple of its sum of digits (18).

It is a congruent number.

It is an unprimeable number.

It is a polite number, since it can be written in 11 ways as a sum of consecutive naturals, for example, 10117 + ... + 11339.

It is an arithmetic number, because the mean of its divisors is an integer number (745875).

Almost surely, 2^13120344 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 13120344, and also a Zumkeller number, because its divisors can be partitioned in two sets with the same sum (17901000).

13120344 is an abundant number, since it is smaller than the sum of its proper divisors (22681656).

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

13120344 is a wasteful number, since it uses less digits than its factorization.

13120344 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 1384 (or 1377 counting only the distinct ones).

The product of its (nonzero) digits is 288, while the sum is 18.

The square root of 13120344 is about 3622.2015404999. The cubic root of 13120344 is about 235.8568029129.

Adding to 13120344 its reverse (44302131), we get a palindrome (57422475).

The spelling of 13120344 in words is "thirteen million, one hundred twenty thousand, three hundred forty-four".