8685138 has 48 divisors (see below), whose sum is σ = 21833280. Its totient is φ = 2254560.

The previous prime is 8685107. The next prime is 8685151. The reversal of 8685138 is 8315868.

It is a happy number.

It is a junction number, because it is equal to n+sod(n) for n = 8685096 and 8685105.

It is an unprimeable number.

It is a polite number, since it can be written in 23 ways as a sum of consecutive naturals, for example, 4228 + ... + 5936.

It is an arithmetic number, because the mean of its divisors is an integer number (454860).

Almost surely, 2^8685138 is an apocalyptic number.

It is a practical number, because each smaller number is the sum of distinct divisors of 8685138, and also a Zumkeller number, because its divisors can be partitioned in two sets with the same sum (10916640).

8685138 is an abundant number, since it is smaller than the sum of its proper divisors (13148142).

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

8685138 is a wasteful number, since it uses less digits than its factorization.

8685138 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 1743 (or 1732 counting only the distinct ones).

The product of its digits is 46080, while the sum is 39.

The square root of 8685138 is about 2947.0558189488. The cubic root of 8685138 is about 205.5538305945.

It can be divided in two parts, 868 and 5138, that added together give a palindrome (6006).

The spelling of 8685138 in words is "eight million, six hundred eighty-five thousand, one hundred thirty-eight".