13349780 has 54 divisors (see below), whose sum is σ = 30291786. Its totient is φ = 4941216.

The previous prime is 13349779. The next prime is 13349783. The reversal of 13349780 is 8794331.

It can be written as a sum of positive squares in only one way, i.e., 10679824 + 2669956 = 3268^2 + 1634^2 .

It is a self number, because there is not a number n which added to its sum of digits gives 13349780.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (13349783) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (13) of ones.

It is a polite number, since it can be written in 17 ways as a sum of consecutive naturals, for example, 310439 + ... + 310481.

It is an arithmetic number, because the mean of its divisors is an integer number (560959).

Almost surely, 2^13349780 is an apocalyptic number.

13349780 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 13349780, and also a Zumkeller number, because its divisors can be partitioned in two sets with the same sum (15145893).

13349780 is an abundant number, since it is smaller than the sum of its proper divisors (16942006).

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

13349780 is a wasteful number, since it uses less digits than its factorization.

13349780 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 133 (or 69 counting only the distinct ones).

The product of its (nonzero) digits is 18144, while the sum is 35.

The square root of 13349780 is about 3653.7350752347. The cubic root of 13349780 is about 237.2236786363.

The spelling of 13349780 in words is "thirteen million, three hundred forty-nine thousand, seven hundred eighty".