13681588 has 12 divisors (see below), whose sum is σ = 24155460. Its totient is φ = 6780032.

The previous prime is 13681541. The next prime is 13681589. The reversal of 13681588 is 88518631.

It can be written as a sum of positive squares in 2 ways, for example, as 4848804 + 8832784 = 2202^2 + 2972^2 .

It is a self number, because there is not a number n which added to its sum of digits gives 13681588.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (13681589) 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 3 ways as a sum of consecutive naturals, for example, 14683 + ... + 15586.

It is an arithmetic number, because the mean of its divisors is an integer number (2012955).

Almost surely, 2^13681588 is an apocalyptic number.

It is an amenable number.

13681588 is a deficient number, since it is larger than the sum of its proper divisors (10473872).

13681588 is a wasteful number, since it uses less digits than its factorization.

13681588 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 30386 (or 30384 counting only the distinct ones).

The product of its digits is 46080, while the sum is 40.

The square root of 13681588 is about 3698.8630685658. The cubic root of 13681588 is about 239.1730101201.

The spelling of 13681588 in words is "thirteen million, six hundred eighty-one thousand, five hundred eighty-eight".