13130444 has 24 divisors (see below), whose sum is σ = 24338160. Its totient is φ = 6181056.
The previous prime is 13130441. The next prime is 13130461. The reversal of 13130444 is 44403131.
It is a happy number.
It is a plaindrome in base 15.
It is not an unprimeable number, because it can be changed into a prime (13130441) by changing a digit.
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 7 ways as a sum of consecutive naturals, for example, 14534 + ... + 15410.
It is an arithmetic number, because the mean of its divisors is an integer number (1014090).
Almost surely, 213130444 is an apocalyptic number.
It is an amenable number.
13130444 is a deficient number, since it is larger than the sum of its proper divisors (11207716).
13130444 is a wasteful number, since it uses less digits than its factorization.
13130444 is an odious number, because the sum of its binary digits is odd.
The sum of its prime factors is 1097 (or 1095 counting only the distinct ones).
The product of its (nonzero) digits is 576, while the sum is 20.
The square root of 13130444 is about 3623.5954520338. The cubic root of 13130444 is about 235.9173080011.
Adding to 13130444 its reverse (44403131), we get a palindrome (57533575).
The spelling of 13130444 in words is "thirteen million, one hundred thirty thousand, four hundred forty-four".
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