13890000 has 100 divisors (see below), whose sum is σ = 44935616. Its totient is φ = 3696000.

The previous prime is 13889987. The next prime is 13890011. The reversal of 13890000 is 9831.

It is a tau number, because it is divible by the number of its divisors (100).

It is a congruent number.

It is an unprimeable number.

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 19 ways as a sum of consecutive naturals, for example, 29769 + ... + 30231.

Almost surely, 2^13890000 is an apocalyptic number.

13890000 is a gapful number since it is divisible by the number (10) formed by its first and last digit.

It is an amenable number.

It is a practical number, because each smaller number is the sum of distinct divisors of 13890000, and also a Zumkeller number, because its divisors can be partitioned in two sets with the same sum (22467808).

13890000 is an abundant number, since it is smaller than the sum of its proper divisors (31045616).

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

13890000 is an equidigital number, since it uses as much as digits as its factorization.

13890000 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 494 (or 473 counting only the distinct ones).

The product of its (nonzero) digits is 216, while the sum is 21.

The square root of 13890000 is about 3726.9290307168. The cubic root of 13890000 is about 240.3813382117.

Adding to 13890000 its reverse (9831), we get a palindrome (13899831).

The spelling of 13890000 in words is "thirteen million, eight hundred ninety thousand".