13138812 has 36 divisors (see below), whose sum is σ = 33445776. Its totient is φ = 4348800.

The previous prime is 13138789. The next prime is 13138813. The reversal of 13138812 is 21883131.

It is a tau number, because it is divible by the number of its divisors (36).

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (13138813) by changing a digit.

It is a polite number, since it can be written in 11 ways as a sum of consecutive naturals, for example, 4228 + ... + 6644.

Almost surely, 2^13138812 is an apocalyptic number.

13138812 is a gapful number since it is divisible by the number (12) formed by its first and last digit.

It is an amenable number.

13138812 is an abundant number, since it is smaller than the sum of its proper divisors (20306964).

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

13138812 is a wasteful number, since it uses less digits than its factorization.

13138812 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 2578 (or 2573 counting only the distinct ones).

The product of its digits is 1152, while the sum is 27.

The square root of 13138812 is about 3624.7499224084. The cubic root of 13138812 is about 235.9674138672.

The spelling of 13138812 in words is "thirteen million, one hundred thirty-eight thousand, eight hundred twelve".