13304638 has 4 divisors (see below), whose sum is σ = 19956960. Its totient is φ = 6652318.

The previous prime is 13304593. The next prime is 13304639. The reversal of 13304638 is 83640331.

13304638 is digitally balanced in base 2, because in such base it contains all the possibile digits an equal number of times.

It is a semiprime because it is the product of two primes.

It is a super-2 number, since 2×13304638² = 354026784622088, which contains 22 as substring.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (13304639) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 3326158 + ... + 3326161.

It is an arithmetic number, because the mean of its divisors is an integer number (4989240).

Almost surely, 2^13304638 is an apocalyptic number.

13304638 is a deficient number, since it is larger than the sum of its proper divisors (6652322).

13304638 is an equidigital number, since it uses as much as digits as its factorization.

13304638 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 6652321.

The product of its (nonzero) digits is 5184, while the sum is 28.

The square root of 13304638 is about 3647.5523299879. The cubic root of 13304638 is about 236.9559877205.

Adding to 13304638 its reverse (83640331), we get a palindrome (96944969).

The spelling of 13304638 in words is "thirteen million, three hundred four thousand, six hundred thirty-eight".