13890406 has 8 divisors (see below), whose sum is σ = 21932280. Its totient is φ = 6579648.

The previous prime is 13890379. The next prime is 13890407. The reversal of 13890406 is 60409831.

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

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (13890407) 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, 182731 + ... + 182806.

It is an arithmetic number, because the mean of its divisors is an integer number (2741535).

Almost surely, 2^13890406 is an apocalyptic number.

13890406 is a deficient number, since it is larger than the sum of its proper divisors (8041874).

13890406 is a wasteful number, since it uses less digits than its factorization.

13890406 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 365558.

The product of its (nonzero) digits is 5184, while the sum is 31.

The square root of 13890406 is about 3726.9834987561. The cubic root of 13890406 is about 240.3836802773.

The spelling of 13890406 in words is "thirteen million, eight hundred ninety thousand, four hundred six".