12789280 has 96 divisors (see below), whose sum is σ = 36408960. Its totient is φ = 4147200.

The previous prime is 12789269. The next prime is 12789289. The reversal of 12789280 is 8298721.

It is not an unprimeable number, because it can be changed into a prime (12789289) 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, 20980 + ... + 21580.

It is an arithmetic number, because the mean of its divisors is an integer number (379260).

Almost surely, 2^12789280 is an apocalyptic number.

12789280 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 12789280, and also a Zumkeller number, because its divisors can be partitioned in two sets with the same sum (18204480).

12789280 is an abundant number, since it is smaller than the sum of its proper divisors (23619680).

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

12789280 is a wasteful number, since it uses less digits than its factorization.

12789280 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 642 (or 634 counting only the distinct ones).

The product of its (nonzero) digits is 16128, while the sum is 37.

The square root of 12789280 is about 3576.2102846449. The cubic root of 12789280 is about 233.8560977553.

The spelling of 12789280 in words is "twelve million, seven hundred eighty-nine thousand, two hundred eighty".