13550720 has 64 divisors (see below), whose sum is σ = 33488640. Its totient is φ = 5237760.

The previous prime is 13550701. The next prime is 13550729. The reversal of 13550720 is 2705531.

It is a tau number, because it is divible by the number of its divisors (64).

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (13550729) by changing a digit.

It is a polite number, since it can be written in 7 ways as a sum of consecutive naturals, for example, 19499 + ... + 20181.

It is an arithmetic number, because the mean of its divisors is an integer number (523260).

Almost surely, 2^13550720 is an apocalyptic number.

13550720 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 13550720, and also a Zumkeller number, because its divisors can be partitioned in two sets with the same sum (16744320).

13550720 is an abundant number, since it is smaller than the sum of its proper divisors (19937920).

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

13550720 is an equidigital number, since it uses as much as digits as its factorization.

13550720 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 733 (or 721 counting only the distinct ones).

The product of its (nonzero) digits is 1050, while the sum is 23.

The square root of 13550720 is about 3681.1302612105. The cubic root of 13550720 is about 238.4079813552.

The spelling of 13550720 in words is "thirteen million, five hundred fifty thousand, seven hundred twenty".