13581968 has 40 divisors (see below), whose sum is σ = 27498240. Its totient is φ = 6491520.

The previous prime is 13581959. The next prime is 13581973. The reversal of 13581968 is 86918531.

It is an unprimeable number.

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 7 ways as a sum of consecutive naturals, for example, 68846 + ... + 69042.

It is an arithmetic number, because the mean of its divisors is an integer number (687456).

Almost surely, 2^13581968 is an apocalyptic number.

It is an amenable number.

It is a practical number, because each smaller number is the sum of distinct divisors of 13581968, and also a Zumkeller number, because its divisors can be partitioned in two sets with the same sum (13749120).

13581968 is an abundant number, since it is smaller than the sum of its proper divisors (13916272).

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

13581968 is a wasteful number, since it uses less digits than its factorization.

13581968 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 375 (or 369 counting only the distinct ones).

The product of its digits is 51840, while the sum is 41.

The square root of 13581968 is about 3685.3721657385. The cubic root of 13581968 is about 238.5910971731.

The spelling of 13581968 in words is "thirteen million, five hundred eighty-one thousand, nine hundred sixty-eight".