13805550 has 72 divisors (see below), whose sum is σ = 40477320. Its totient is φ = 3345600.

The previous prime is 13805531. The next prime is 13805593. The reversal of 13805550 is 5550831.

It is a congruent number.

It is an unprimeable number.

It is a polite number, since it can be written in 35 ways as a sum of consecutive naturals, for example, 3556 + ... + 6344.

It is an arithmetic number, because the mean of its divisors is an integer number (562185).

Almost surely, 2^13805550 is an apocalyptic number.

13805550 is a gapful number since it is divisible by the number (10) formed by its first and last digit.

It is a practical number, because each smaller number is the sum of distinct divisors of 13805550, and also a Zumkeller number, because its divisors can be partitioned in two sets with the same sum (20238660).

13805550 is an abundant number, since it is smaller than the sum of its proper divisors (26671770).

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

13805550 is a wasteful number, since it uses less digits than its factorization.

13805550 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 2818 (or 2810 counting only the distinct ones).

The product of its (nonzero) digits is 3000, while the sum is 27.

The square root of 13805550 is about 3715.5820539991. The cubic root of 13805550 is about 239.8931816314.

The spelling of 13805550 in words is "thirteen million, eight hundred five thousand, five hundred fifty".