13890380 has 48 divisors (see below), whose sum is σ = 34062336. Its totient is φ = 4658880.

The previous prime is 13890379. The next prime is 13890407. The reversal of 13890380 is 8309831.

It is a Smith number, since the sum of its digits (32) coincides with the sum of the digits of its prime factors.

It is an unprimeable number.

It is a polite number, since it can be written in 15 ways as a sum of consecutive naturals, for example, 5525 + ... + 7635.

It is an arithmetic number, because the mean of its divisors is an integer number (709632).

Almost surely, 2^13890380 is an apocalyptic number.

13890380 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 13890380, and also a Zumkeller number, because its divisors can be partitioned in two sets with the same sum (17031168).

13890380 is an abundant number, since it is smaller than the sum of its proper divisors (20171956).

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

13890380 is a wasteful number, since it uses less digits than its factorization.

13890380 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 2174 (or 2172 counting only the distinct ones).

The product of its (nonzero) digits is 5184, while the sum is 32.

The square root of 13890380 is about 3726.9800106789. The cubic root of 13890380 is about 240.3835302942.

The spelling of 13890380 in words is "thirteen million, eight hundred ninety thousand, three hundred eighty".