12903280 has 80 divisors (see below), whose sum is σ = 34060320. Its totient is φ = 4506624.

The previous prime is 12903277. The next prime is 12903281. The reversal of 12903280 is 8230921.

It is a tau number, because it is divible by the number of its divisors (80).

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (12903281) 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 15 ways as a sum of consecutive naturals, for example, 19434 + ... + 20086.

It is an arithmetic number, because the mean of its divisors is an integer number (425754).

Almost surely, 2^12903280 is an apocalyptic number.

12903280 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 12903280, and also a Zumkeller number, because its divisors can be partitioned in two sets with the same sum (17030160).

12903280 is an abundant number, since it is smaller than the sum of its proper divisors (21157040).

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

12903280 is a wasteful number, since it uses less digits than its factorization.

12903280 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 698 (or 692 counting only the distinct ones).

The product of its (nonzero) digits is 864, while the sum is 25.

The square root of 12903280 is about 3592.1135839503. The cubic root of 12903280 is about 234.5488855973.

The spelling of 12903280 in words is "twelve million, nine hundred three thousand, two hundred eighty".