13890423 has 8 divisors (see below), whose sum is σ = 18539136. Its totient is φ = 9251000.

The previous prime is 13890421. The next prime is 13890433. The reversal of 13890423 is 32409831.

It is a sphenic number, since it is the product of 3 distinct primes.

It is a cyclic number.

It is not a de Polignac number, because 13890423 - 2¹ = 13890421 is a prime.

It is a super-2 number, since 2×13890423² = 385887702237858, which contains 22 as substring.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (13890421) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (17) of ones.

It is a polite number, since it can be written in 7 ways as a sum of consecutive naturals, for example, 2758 + ... + 5948.

It is an arithmetic number, because the mean of its divisors is an integer number (2317392).

Almost surely, 2^13890423 is an apocalyptic number.

13890423 is a deficient number, since it is larger than the sum of its proper divisors (4648713).

13890423 is a wasteful number, since it uses less digits than its factorization.

13890423 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 4645.

The product of its (nonzero) digits is 5184, while the sum is 30.

The square root of 13890423 is about 3726.9857794201. The cubic root of 13890423 is about 240.3837783431.

The spelling of 13890423 in words is "thirteen million, eight hundred ninety thousand, four hundred twenty-three".