13287890 has 32 divisors (see below), whose sum is σ = 29821824. Its totient is φ = 4141440.

The previous prime is 13287889. The next prime is 13287893. The reversal of 13287890 is 9878231.

It is a Smith number, since the sum of its digits (38) 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 not an unprimeable number, because it can be changed into a prime (13287893) 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 15 ways as a sum of consecutive naturals, for example, 7859 + ... + 9398.

It is an arithmetic number, because the mean of its divisors is an integer number (931932).

Almost surely, 2^13287890 is an apocalyptic number.

13287890 is a gapful number since it is divisible by the number (10) formed by its first and last digit.

13287890 is an abundant number, since it is smaller than the sum of its proper divisors (16533934).

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

13287890 is a wasteful number, since it uses less digits than its factorization.

13287890 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 17282.

The product of its (nonzero) digits is 24192, while the sum is 38.

The square root of 13287890 is about 3645.2558209267. The cubic root of 13287890 is about 236.8565185164.

The spelling of 13287890 in words is "thirteen million, two hundred eighty-seven thousand, eight hundred ninety".