13866489 has 24 divisors (see below), whose sum is σ = 24652992. Its totient is φ = 7313760.

The previous prime is 13866439. The next prime is 13866491. The reversal of 13866489 is 98466831.

It is not a de Polignac number, because 13866489 - 2⁸ = 13866233 is a prime.

It is not an unprimeable number, because it can be changed into a prime (13866439) by changing a digit.

It is a polite number, since it can be written in 23 ways as a sum of consecutive naturals, for example, 7647 + ... + 9284.

It is an arithmetic number, because the mean of its divisors is an integer number (1027208).

Almost surely, 2^13866489 is an apocalyptic number.

It is an amenable number.

13866489 is a deficient number, since it is larger than the sum of its proper divisors (10786503).

13866489 is a wasteful number, since it uses less digits than its factorization.

13866489 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 16957 (or 16954 counting only the distinct ones).

The product of its digits is 248832, while the sum is 45.

The square root of 13866489 is about 3723.7734893519. The cubic root of 13866489 is about 240.2456339308.

It can be divided in two parts, 1386 and 6489, that added together give a triangular number (7875 = T₁₂₅).

The spelling of 13866489 in words is "thirteen million, eight hundred sixty-six thousand, four hundred eighty-nine".