13507638 has 16 divisors (see below), whose sum is σ = 27294960. Its totient is φ = 4455936.

The previous prime is 13507631. The next prime is 13507643. The reversal of 13507638 is 83670531.

It is a happy number.

13507638 is digitally balanced in base 2, because in such base it contains all the possibile digits an equal number of times.

It is a junction number, because it is equal to n+sod(n) for n = 13507599 and 13507608.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (13507631) by changing a digit.

It is a polite number, since it can be written in 7 ways as a sum of consecutive naturals, for example, 11023 + ... + 12186.

It is an arithmetic number, because the mean of its divisors is an integer number (1705935).

Almost surely, 2^13507638 is an apocalyptic number.

13507638 is an abundant number, since it is smaller than the sum of its proper divisors (13787322).

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

13507638 is a wasteful number, since it uses less digits than its factorization.

13507638 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 23311.

The product of its (nonzero) digits is 15120, while the sum is 33.

The square root of 13507638 is about 3675.2738673465. The cubic root of 13507638 is about 238.1550551410.

The spelling of 13507638 in words is "thirteen million, five hundred seven thousand, six hundred thirty-eight".