13880389 has 4 divisors (see below), whose sum is σ = 13889260. Its totient is φ = 13871520.

The previous prime is 13880371. The next prime is 13880407. The reversal of 13880389 is 98308831.

13880389 is digitally balanced in base 2, because in such base it contains all the possibile digits an equal number of times.

It is a semiprime because it is the product of two primes, and also a brilliant number, because the two primes have the same length.

It is an interprime number because it is at equal distance from previous prime (13880371) and next prime (13880407).

It can be written as a sum of positive squares in 2 ways, for example, as 12659364 + 1221025 = 3558^2 + 1105^2 .

It is a cyclic number.

It is not a de Polignac number, because 13880389 - 2⁷ = 13880261 is a prime.

It is a Duffinian number.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (13884389) by changing a digit.

It is a polite number, since it can be written in 3 ways as a sum of consecutive naturals, for example, 1392 + ... + 5449.

It is an arithmetic number, because the mean of its divisors is an integer number (3472315).

Almost surely, 2^13880389 is an apocalyptic number.

It is an amenable number.

13880389 is a deficient number, since it is larger than the sum of its proper divisors (8871).

13880389 is an equidigital number, since it uses as much as digits as its factorization.

13880389 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 8870.

The product of its (nonzero) digits is 41472, while the sum is 40.

The square root of 13880389 is about 3725.6394082090. The cubic root of 13880389 is about 240.3258825336.

The spelling of 13880389 in words is "thirteen million, eight hundred eighty thousand, three hundred eighty-nine".