13206138 has 32 divisors (see below), whose sum is σ = 29218752. Its totient is φ = 3945600.

The previous prime is 13206131. The next prime is 13206173. The reversal of 13206138 is 83160231.

It is not an unprimeable number, because it can be changed into a prime (13206131) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (11) of ones.

It is a polite number, since it can be written in 15 ways as a sum of consecutive naturals, for example, 3448 + ... + 6188.

It is an arithmetic number, because the mean of its divisors is an integer number (913086).

Almost surely, 2^13206138 is an apocalyptic number.

It is a practical number, because each smaller number is the sum of distinct divisors of 13206138, and also a Zumkeller number, because its divisors can be partitioned in two sets with the same sum (14609376).

13206138 is an abundant number, since it is smaller than the sum of its proper divisors (16012614).

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

13206138 is a wasteful number, since it uses less digits than its factorization.

13206138 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 2830.

The product of its (nonzero) digits is 864, while the sum is 24.

The square root of 13206138 is about 3634.0250411906. The cubic root of 13206138 is about 236.3697760553.

Adding to 13206138 its reverse (83160231), we get a palindrome (96366369).

The spelling of 13206138 in words is "thirteen million, two hundred six thousand, one hundred thirty-eight".