13889146 has 4 divisors (see below), whose sum is σ = 20833722. Its totient is φ = 6944572.

The previous prime is 13889143. The next prime is 13889159. The reversal of 13889146 is 64198831.

It is a semiprime because it is the product of two primes.

It can be written as a sum of positive squares in only one way, i.e., 9541921 + 4347225 = 3089^2 + 2085^2 .

It is a Smith number, since the sum of its digits (40) coincides with the sum of the digits of its prime factors. Since it is squarefree, it is also a hoax number.

It is a junction number, because it is equal to n+sod(n) for n = 13889099 and 13889108.

It is not an unprimeable number, because it can be changed into a prime (13889143) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 3472285 + ... + 3472288.

Almost surely, 2^13889146 is an apocalyptic number.

13889146 is a deficient number, since it is larger than the sum of its proper divisors (6944576).

13889146 is an equidigital number, since it uses as much as digits as its factorization.

13889146 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 6944575.

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

The square root of 13889146 is about 3726.8144574153. The cubic root of 13889146 is about 240.3764116490.

The spelling of 13889146 in words is "thirteen million, eight hundred eighty-nine thousand, one hundred forty-six".