13260640 has 48 divisors (see below), whose sum is σ = 31821552. Its totient is φ = 5220864.

The previous prime is 13260619. The next prime is 13260647. The reversal of 13260640 is 4606231.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (13260647) 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, 10102 + ... + 11338.

It is an arithmetic number, because the mean of its divisors is an integer number (662949).

Almost surely, 2^13260640 is an apocalyptic number.

13260640 is a gapful number since it is divisible by the number (10) 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 13260640, and also a Zumkeller number, because its divisors can be partitioned in two sets with the same sum (15910776).

13260640 is an abundant number, since it is smaller than the sum of its proper divisors (18560912).

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

13260640 is a wasteful number, since it uses less digits than its factorization.

13260640 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 1319 (or 1311 counting only the distinct ones).

The product of its (nonzero) digits is 864, while the sum is 22.

The square root of 13260640 is about 3641.5161677521. The cubic root of 13260640 is about 236.6944973774.

Adding to 13260640 its reverse (4606231), we get a palindrome (17866871).

The spelling of 13260640 in words is "thirteen million, two hundred sixty thousand, six hundred forty".