13031304 has 64 divisors (see below), whose sum is σ = 38283840. Its totient is φ = 3644160.

The previous prime is 13031261. The next prime is 13031309. The reversal of 13031304 is 40313031.

13031304 is digitally balanced in base 2 and base 4, because in such bases it contains all the possibile digits an equal number of times.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (13031309) by changing a digit.

It is a polite number, since it can be written in 15 ways as a sum of consecutive naturals, for example, 1534 + ... + 5330.

It is an arithmetic number, because the mean of its divisors is an integer number (598185).

Almost surely, 2^13031304 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 13031304, and also a Zumkeller number, because its divisors can be partitioned in two sets with the same sum (19141920).

13031304 is an abundant number, since it is smaller than the sum of its proper divisors (25252536).

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

13031304 is a wasteful number, since it uses less digits than its factorization.

13031304 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 3830 (or 3826 counting only the distinct ones).

The product of its (nonzero) digits is 108, while the sum is 15.

The square root of 13031304 is about 3609.8897490090. The cubic root of 13031304 is about 235.3220512817.

Adding to 13031304 its reverse (40313031), we get a palindrome (53344335).

The spelling of 13031304 in words is "thirteen million, thirty-one thousand, three hundred four".