12783380 has 12 divisors (see below), whose sum is σ = 26845140. Its totient is φ = 5113344.

The previous prime is 12783367. The next prime is 12783383. The reversal of 12783380 is 8338721.

It can be written as a sum of positive squares in 2 ways, for example, as 8305924 + 4477456 = 2882^2 + 2116^2 .

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (12783383) by changing a digit.

It is a polite number, since it can be written in 3 ways as a sum of consecutive naturals, for example, 319565 + ... + 319604.

It is an arithmetic number, because the mean of its divisors is an integer number (2237095).

Almost surely, 2^12783380 is an apocalyptic number.

12783380 is a gapful number since it is divisible by the number (10) formed by its first and last digit.

It is an amenable number.

12783380 is an abundant number, since it is smaller than the sum of its proper divisors (14061760).

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

12783380 is a wasteful number, since it uses less digits than its factorization.

12783380 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 639178 (or 639176 counting only the distinct ones).

The product of its (nonzero) digits is 8064, while the sum is 32.

The square root of 12783380 is about 3575.3852939229. The cubic root of 12783380 is about 233.8201310915.

The spelling of 12783380 in words is "twelve million, seven hundred eighty-three thousand, three hundred eighty".