12738280 has 16 divisors (see below), whose sum is σ = 28661220. Its totient is φ = 5095296.

The previous prime is 12738247. The next prime is 12738283. The reversal of 12738280 is 8283721.

12738280 is digitally balanced in base 2, because in such base it contains all the possibile digits an equal number of times.

It can be written as a sum of positive squares in 2 ways, for example, as 11710084 + 1028196 = 3422^2 + 1014^2 .

It is not an unprimeable number, because it can be changed into a prime (12738283) 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, 159189 + ... + 159268.

Almost surely, 2^12738280 is an apocalyptic number.

12738280 is a gapful number since it is divisible by the number (10) formed by its first and last digit.

It is an amenable number.

12738280 is an abundant number, since it is smaller than the sum of its proper divisors (15922940).

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

12738280 is a wasteful number, since it uses less digits than its factorization.

12738280 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 318468 (or 318464 counting only the distinct ones).

The product of its (nonzero) digits is 5376, while the sum is 31.

The square root of 12738280 is about 3569.0727087018. The cubic root of 12738280 is about 233.5448331760.

The spelling of 12738280 in words is "twelve million, seven hundred thirty-eight thousand, two hundred eighty".