12786280 has 64 divisors (see below), whose sum is σ = 31530240. Its totient is φ = 4637952.

The previous prime is 12786269. The next prime is 12786281. The reversal of 12786280 is 8268721.

12786280 = T₅₈₄ + T₅₈₅ + ... + T₆₅₀.

It is not an unprimeable number, because it can be changed into a prime (12786281) by changing a digit.

It is a polite number, since it can be written in 15 ways as a sum of consecutive naturals, for example, 34657 + ... + 35023.

It is an arithmetic number, because the mean of its divisors is an integer number (492660).

Almost surely, 2^12786280 is an apocalyptic number.

12786280 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 12786280, and also a Zumkeller number, because its divisors can be partitioned in two sets with the same sum (15765120).

12786280 is an abundant number, since it is smaller than the sum of its proper divisors (18743960).

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

12786280 is a wasteful number, since it uses less digits than its factorization.

12786280 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 458 (or 454 counting only the distinct ones).

The product of its (nonzero) digits is 10752, while the sum is 34.

The square root of 12786280 is about 3575.7908216225. The cubic root of 12786280 is about 233.8378110038.

The spelling of 12786280 in words is "twelve million, seven hundred eighty-six thousand, two hundred eighty".