13640324 has 24 divisors (see below), whose sum is σ = 26150040. Its totient is φ = 6196736.

The previous prime is 13640321. The next prime is 13640339. The reversal of 13640324 is 42304631.

It is a happy number.

It can be written as a sum of positive squares in 4 ways, for example, as 4700224 + 8940100 = 2168^2 + 2990^2 .

It is a self number, because there is not a number n which added to its sum of digits gives 13640324.

It is not an unprimeable number, because it can be changed into a prime (13640321) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (7) of ones.

It is a polite number, since it can be written in 7 ways as a sum of consecutive naturals, for example, 1487 + ... + 5430.

It is an arithmetic number, because the mean of its divisors is an integer number (1089585).

Almost surely, 2^13640324 is an apocalyptic number.

It is an amenable number.

13640324 is a deficient number, since it is larger than the sum of its proper divisors (12509716).

13640324 is a wasteful number, since it uses less digits than its factorization.

13640324 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 6967 (or 6965 counting only the distinct ones).

The product of its (nonzero) digits is 1728, while the sum is 23.

The square root of 13640324 is about 3693.2809262226. The cubic root of 13640324 is about 238.9323174535.

Adding to 13640324 its reverse (42304631), we get a palindrome (55944955).

The spelling of 13640324 in words is "thirteen million, six hundred forty thousand, three hundred twenty-four".