13770720 has 144 divisors (see below), whose sum is σ = 47999952. Its totient is φ = 3594240.

The previous prime is 13770709. The next prime is 13770751. The reversal of 13770720 is 2707731.

13770720 is digitally balanced in base 2, because in such base it contains all the possibile digits an equal number of times.

It is a tau number, because it is divible by the number of its divisors (144).

It is a congruent number.

It is an unprimeable number.

It is a polite number, since it can be written in 23 ways as a sum of consecutive naturals, for example, 105055 + ... + 105185.

It is an arithmetic number, because the mean of its divisors is an integer number (333333).

Almost surely, 2^13770720 is an apocalyptic number.

13770720 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 13770720, and also a Zumkeller number, because its divisors can be partitioned in two sets with the same sum (23999976).

13770720 is an abundant number, since it is smaller than the sum of its proper divisors (34229232).

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

13770720 is a wasteful number, since it uses less digits than its factorization.

13770720 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 225 (or 214 counting only the distinct ones).

The product of its (nonzero) digits is 2058, while the sum is 27.

The square root of 13770720 is about 3710.8920760378. The cubic root of 13770720 is about 239.6912696936.

The spelling of 13770720 in words is "thirteen million, seven hundred seventy thousand, seven hundred twenty".