13093840 has 20 divisors (see below), whose sum is σ = 30443364. Its totient is φ = 5237504.

The previous prime is 13093799. The next prime is 13093841. The reversal of 13093840 is 4839031.

It can be written as a sum of positive squares in 2 ways, for example, as 3779136 + 9314704 = 1944^2 + 3052^2 .

It is a tau number, because it is divible by the number of its divisors (20).

It is a junction number, because it is equal to n+sod(n) for n = 13093799 and 13093808.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (13093841) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (13) of ones.

It is a polite number, since it can be written in 3 ways as a sum of consecutive naturals, for example, 81757 + ... + 81916.

Almost surely, 2^13093840 is an apocalyptic number.

13093840 is a gapful number since it is divisible by the number (10) formed by its first and last digit.

It is an amenable number.

13093840 is an abundant number, since it is smaller than the sum of its proper divisors (17349524).

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

13093840 is a wasteful number, since it uses less digits than its factorization.

13093840 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 163686 (or 163680 counting only the distinct ones).

The product of its (nonzero) digits is 2592, while the sum is 28.

The square root of 13093840 is about 3618.5411425048. The cubic root of 13093840 is about 235.6978801823.

The spelling of 13093840 in words is "thirteen million, ninety-three thousand, eight hundred forty".