13040244 has 96 divisors (see below), whose sum is σ = 39567360. Its totient is φ = 3636576.

The previous prime is 13040231. The next prime is 13040257. The reversal of 13040244 is 44204031.

It is an interprime number because it is at equal distance from previous prime (13040231) and next prime (13040257).

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 31 ways as a sum of consecutive naturals, for example, 35349 + ... + 35715.

It is an arithmetic number, because the mean of its divisors is an integer number (412160).

Almost surely, 2^13040244 is an apocalyptic number.

13040244 is a gapful number since it is divisible by the number (14) formed by its first and last digit.

It is an amenable number.

It is a practical number, because each smaller number is the sum of distinct divisors of 13040244, and also a Zumkeller number, because its divisors can be partitioned in two sets with the same sum (19783680).

13040244 is an abundant number, since it is smaller than the sum of its proper divisors (26527116).

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

13040244 is a wasteful number, since it uses less digits than its factorization.

13040244 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 434 (or 426 counting only the distinct ones).

The product of its (nonzero) digits is 384, while the sum is 18.

The square root of 13040244 is about 3611.1278016708. The cubic root of 13040244 is about 235.3758524523.

Adding to 13040244 its reverse (44204031), we get a palindrome (57244275).

The spelling of 13040244 in words is "thirteen million, forty thousand, two hundred forty-four".