13860018 has 64 divisors (see below), whose sum is σ = 32440320. Its totient is φ = 4381776.

The previous prime is 13860017. The next prime is 13860037. The reversal of 13860018 is 81006831.

It is a Harshad number since it is a multiple of its sum of digits (27).

It is a junction number, because it is equal to n+sod(n) for n = 13859973 and 13860000.

It is not an unprimeable number, because it can be changed into a prime (13860017) by changing a digit.

It is a polite number, since it can be written in 31 ways as a sum of consecutive naturals, for example, 109071 + ... + 109197.

It is an arithmetic number, because the mean of its divisors is an integer number (506880).

Almost surely, 2^13860018 is an apocalyptic number.

13860018 is a gapful number since it is divisible by the number (18) formed by its first and last digit.

It is a practical number, because each smaller number is the sum of distinct divisors of 13860018, and also a Zumkeller number, because its divisors can be partitioned in two sets with the same sum (16220160).

13860018 is an abundant number, since it is smaller than the sum of its proper divisors (18580302).

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

13860018 is a wasteful number, since it uses less digits than its factorization.

13860018 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 228 (or 222 counting only the distinct ones).

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

The square root of 13860018 is about 3722.9045112654. The cubic root of 13860018 is about 240.2082567358.

Adding to 13860018 its reverse (81006831), we get a palindrome (94866849).

The spelling of 13860018 in words is "thirteen million, eight hundred sixty thousand, eighteen".