13855872 has 32 divisors (see below), whose sum is σ = 36805680. Its totient is φ = 4618496.

The previous prime is 13855841. The next prime is 13855873. The reversal of 13855872 is 27855831.

It is a tau number, because it is divible by the number of its divisors (32).

It is a self number, because there is not a number n which added to its sum of digits gives 13855872.

It is not an unprimeable number, because it can be changed into a prime (13855873) by changing a digit.

It is a polite number, since it can be written in 3 ways as a sum of consecutive naturals, for example, 17658 + ... + 18425.

Almost surely, 2^13855872 is an apocalyptic number.

13855872 is a gapful number since it is divisible by the number (12) formed by its first and last digit.

It is an amenable number.

13855872 is an abundant number, since it is smaller than the sum of its proper divisors (22949808).

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

13855872 is an equidigital number, since it uses as much as digits as its factorization.

13855872 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 36100 (or 36088 counting only the distinct ones).

The product of its digits is 67200, while the sum is 39.

The square root of 13855872 is about 3722.3476463114. The cubic root of 13855872 is about 240.1843028768.

The spelling of 13855872 in words is "thirteen million, eight hundred fifty-five thousand, eight hundred seventy-two".