13805520 has 160 divisors (see below), whose sum is σ = 46497024. Its totient is φ = 3379200.

The previous prime is 13805507. The next prime is 13805521. The reversal of 13805520 is 2550831.

13805520 is digitally balanced in base 2 and base 4, because in such bases it contains all the possibile digits an equal number of times.

It is a Harshad number since it is a multiple of its sum of digits (24).

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (13805521) by changing a digit.

It is a polite number, since it can be written in 31 ways as a sum of consecutive naturals, for example, 226290 + ... + 226350.

Almost surely, 2^13805520 is an apocalyptic number.

13805520 is a gapful number since it is divisible by the number (10) formed by its first and last digit.

It is an amenable number.

It is a practical number, because each smaller number is the sum of distinct divisors of 13805520, and also a Zumkeller number, because its divisors can be partitioned in two sets with the same sum (23248512).

13805520 is an abundant number, since it is smaller than the sum of its proper divisors (32691504).

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

13805520 is a wasteful number, since it uses less digits than its factorization.

13805520 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 141 (or 135 counting only the distinct ones).

The product of its (nonzero) digits is 1200, while the sum is 24.

The square root of 13805520 is about 3715.5780169443. The cubic root of 13805520 is about 239.8930078655.

It can be divided in two parts, 138055 and 20, that added together give a triangular number (138075 = T₅₂₅).

The spelling of 13805520 in words is "thirteen million, eight hundred five thousand, five hundred twenty".