13489890 has 16 divisors (see below), whose sum is σ = 32375808. Its totient is φ = 3597296.

The previous prime is 13489873. The next prime is 13489909. The reversal of 13489890 is 9898431.

It is a Smith number, since the sum of its digits (42) coincides with the sum of the digits of its prime factors. Since it is squarefree, it is also a hoax number.

It is a Curzon number.

It is an unprimeable number.

It is a polite number, since it can be written in 7 ways as a sum of consecutive naturals, for example, 224802 + ... + 224861.

It is an arithmetic number, because the mean of its divisors is an integer number (2023488).

Almost surely, 2^13489890 is an apocalyptic number.

13489890 is a gapful number since it is divisible by the number (10) formed by its first and last digit.

13489890 is an abundant number, since it is smaller than the sum of its proper divisors (18885918).

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

13489890 is a wasteful number, since it uses less digits than its factorization.

13489890 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 449673.

The product of its (nonzero) digits is 62208, while the sum is 42.

The square root of 13489890 is about 3672.8585597597. The cubic root of 13489890 is about 238.0507036007.

The spelling of 13489890 in words is "thirteen million, four hundred eighty-nine thousand, eight hundred ninety".