13865560 has 16 divisors (see below), whose sum is σ = 31197600. Its totient is φ = 5546208.

The previous prime is 13865549. The next prime is 13865581. The reversal of 13865560 is 6556831.

It is a super-2 number, since 2×13865560² = 384507508227200, which contains 22 as substring.

It is a congruent number.

It is an unprimeable number.

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, 173280 + ... + 173359.

It is an arithmetic number, because the mean of its divisors is an integer number (1949850).

Almost surely, 2^13865560 is an apocalyptic number.

13865560 is a gapful number since it is divisible by the number (10) formed by its first and last digit.

It is an amenable number.

13865560 is an abundant number, since it is smaller than the sum of its proper divisors (17332040).

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

13865560 is a wasteful number, since it uses less digits than its factorization.

13865560 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 346650 (or 346646 counting only the distinct ones).

The product of its (nonzero) digits is 21600, while the sum is 34.

The square root of 13865560 is about 3723.6487482038. The cubic root of 13865560 is about 240.2402686414.

The spelling of 13865560 in words is "thirteen million, eight hundred sixty-five thousand, five hundred sixty".