13322540 has 96 divisors (see below), whose sum is σ = 35900928. Its totient is φ = 4032000.

The previous prime is 13322539. The next prime is 13322563. The reversal of 13322540 is 4522331.

It is a happy number.

13322540 is nontrivially palindromic in base 9.

It is a Harshad number since it is a multiple of its sum of digits (20).

It is an unprimeable number.

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 31 ways as a sum of consecutive naturals, for example, 63035 + ... + 63245.

It is an arithmetic number, because the mean of its divisors is an integer number (373968).

Almost surely, 2^13322540 is an apocalyptic number.

13322540 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 13322540, and also a Zumkeller number, because its divisors can be partitioned in two sets with the same sum (17950464).

13322540 is an abundant number, since it is smaller than the sum of its proper divisors (22578388).

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

13322540 is a wasteful number, since it uses less digits than its factorization.

13322540 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 279 (or 277 counting only the distinct ones).

The product of its (nonzero) digits is 720, while the sum is 20.

The square root of 13322540 is about 3650.0054794479. The cubic root of 13322540 is about 237.0622184680.

Adding to 13322540 its reverse (4522331), we get a palindrome (17844871).

The spelling of 13322540 in words is "thirteen million, three hundred twenty-two thousand, five hundred forty".