13204644 has 12 divisors (see below), whose sum is σ = 30810864. Its totient is φ = 4401544.

The previous prime is 13204643. The next prime is 13204649. The reversal of 13204644 is 44640231.

13204644 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 tau number, because it is divible by the number of its divisors (12).

It is not an unprimeable number, because it can be changed into a prime (13204643) by changing a digit.

It is a polite number, since it can be written in 3 ways as a sum of consecutive naturals, for example, 550182 + ... + 550205.

It is an arithmetic number, because the mean of its divisors is an integer number (2567572).

Almost surely, 2^13204644 is an apocalyptic number.

It is an amenable number.

13204644 is an abundant number, since it is smaller than the sum of its proper divisors (17606220).

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

13204644 is a wasteful number, since it uses less digits than its factorization.

13204644 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 1100394 (or 1100392 counting only the distinct ones).

The product of its (nonzero) digits is 2304, while the sum is 24.

The square root of 13204644 is about 3633.8194781799. The cubic root of 13204644 is about 236.3608622769.

Adding to 13204644 its reverse (44640231), we get a palindrome (57844875).

The spelling of 13204644 in words is "thirteen million, two hundred four thousand, six hundred forty-four".