13489668 has 18 divisors (see below), whose sum is σ = 34098974. Its totient is φ = 4496544.

The previous prime is 13489667. The next prime is 13489691. The reversal of 13489668 is 86698431.

It can be written as a sum of positive squares in only one way, i.e., 13483584 + 6084 = 3672^2 + 78^2 .

It is a tau number, because it is divible by the number of its divisors (18).

It is a super-2 number, since 2×13489668² = 363942285500448, which contains 22 as substring.

It is not an unprimeable number, because it can be changed into a prime (13489667) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (11) of ones.

It is a polite number, since it can be written in 5 ways as a sum of consecutive naturals, for example, 187321 + ... + 187392.

Almost surely, 2^13489668 is an apocalyptic number.

13489668 is a gapful number since it is divisible by the number (18) formed by its first and last digit.

It is an amenable number.

13489668 is an abundant number, since it is smaller than the sum of its proper divisors (20609306).

It is a pseudoperfect number, because it is the sum of a subset of its proper divisors.

13489668 is a wasteful number, since it uses less digits than its factorization.

13489668 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 374723 (or 374718 counting only the distinct ones).

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

The square root of 13489668 is about 3672.8283379434. The cubic root of 13489668 is about 238.0493977451.

The spelling of 13489668 in words is "thirteen million, four hundred eighty-nine thousand, six hundred sixty-eight".