13138836 has 24 divisors (see below), whose sum is σ = 30881760. Its totient is φ = 4347552.

The previous prime is 13138813. The next prime is 13138837. The reversal of 13138836 is 63883131.

It is a happy number.

13138836 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 super-2 number, since 2×13138836² = 345258022869792, which contains 22 as substring.

It is a junction number, because it is equal to n+sod(n) for n = 13138797 and 13138806.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (13138837) 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, 2271 + ... + 5606.

It is an arithmetic number, because the mean of its divisors is an integer number (1286740).

Almost surely, 2^13138836 is an apocalyptic number.

It is an amenable number.

13138836 is an abundant number, since it is smaller than the sum of its proper divisors (17742924).

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

13138836 is a wasteful number, since it uses less digits than its factorization.

13138836 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 8023 (or 8021 counting only the distinct ones).

The product of its digits is 10368, while the sum is 33.

The square root of 13138836 is about 3624.7532329801. The cubic root of 13138836 is about 235.9675575437.

The spelling of 13138836 in words is "thirteen million, one hundred thirty-eight thousand, eight hundred thirty-six".