13857138 has 24 divisors (see below), whose sum is σ = 30095676. Its totient is φ = 4608000.

The previous prime is 13857131. The next prime is 13857163. The reversal of 13857138 is 83175831.

It can be written as a sum of positive squares in 2 ways, for example, as 13593969 + 263169 = 3687^2 + 513^2 .

It is not an unprimeable number, because it can be changed into a prime (13857131) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (13) of ones.

It is a polite number, since it can be written in 11 ways as a sum of consecutive naturals, for example, 10938 + ... + 12138.

Almost surely, 2^13857138 is an apocalyptic number.

13857138 is a gapful number since it is divisible by the number (18) formed by its first and last digit.

13857138 is an abundant number, since it is smaller than the sum of its proper divisors (16238538).

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

13857138 is a wasteful number, since it uses less digits than its factorization.

13857138 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 1850 (or 1847 counting only the distinct ones).

The product of its digits is 20160, while the sum is 36.

The square root of 13857138 is about 3722.5176963985. The cubic root of 13857138 is about 240.1916178035.

The spelling of 13857138 in words is "thirteen million, eight hundred fifty-seven thousand, one hundred thirty-eight".