13890806 has 8 divisors (see below), whose sum is σ = 21320904. Its totient is φ = 6783840.

The previous prime is 13890791. The next prime is 13890817. The reversal of 13890806 is 60809831.

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

It is a Curzon number.

It is a congruent number.

It is an unprimeable number.

It is a polite number, since it can be written in 3 ways as a sum of consecutive naturals, for example, 80675 + ... + 80846.

It is an arithmetic number, because the mean of its divisors is an integer number (2665113).

Almost surely, 2^13890806 is an apocalyptic number.

13890806 is a deficient number, since it is larger than the sum of its proper divisors (7430098).

13890806 is a wasteful number, since it uses less digits than its factorization.

13890806 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 161566.

The product of its (nonzero) digits is 10368, while the sum is 35.

The square root of 13890806 is about 3727.0371610704. The cubic root of 13890806 is about 240.3859876864.

The spelling of 13890806 in words is "thirteen million, eight hundred ninety thousand, eight hundred six".