12785380 has 12 divisors (see below), whose sum is σ = 26849340. Its totient is φ = 5114144.

The previous prime is 12785369. The next prime is 12785389. The reversal of 12785380 is 8358721.

It can be written as a sum of positive squares in 2 ways, for example, as 5419584 + 7365796 = 2328^2 + 2714^2 .

It is not an unprimeable number, because it can be changed into a prime (12785389) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (11) of ones.

It is a polite number, since it can be written in 3 ways as a sum of consecutive naturals, for example, 319615 + ... + 319654.

It is an arithmetic number, because the mean of its divisors is an integer number (2237445).

Almost surely, 2^12785380 is an apocalyptic number.

12785380 is a gapful number since it is divisible by the number (10) formed by its first and last digit.

It is an amenable number.

12785380 is an abundant number, since it is smaller than the sum of its proper divisors (14063960).

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

12785380 is a wasteful number, since it uses less digits than its factorization.

12785380 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 639278 (or 639276 counting only the distinct ones).

The product of its (nonzero) digits is 13440, while the sum is 34.

The square root of 12785380 is about 3575.6649731204. The cubic root of 12785380 is about 233.8323244205.

The spelling of 12785380 in words is "twelve million, seven hundred eighty-five thousand, three hundred eighty".