12736280 has 16 divisors (see below), whose sum is σ = 28656720. Its totient is φ = 5094496.

The previous prime is 12736279. The next prime is 12736309. The reversal of 12736280 is 8263721.

It is a happy number.

It is a congruent number.

It is an unprimeable number.

It is a polite number, since it can be written in 3 ways as a sum of consecutive naturals, for example, 159164 + ... + 159243.

It is an arithmetic number, because the mean of its divisors is an integer number (1791045).

Almost surely, 2^12736280 is an apocalyptic number.

12736280 is a gapful number since it is divisible by the number (10) formed by its first and last digit.

It is an amenable number.

12736280 is an abundant number, since it is smaller than the sum of its proper divisors (15920440).

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

12736280 is a wasteful number, since it uses less digits than its factorization.

12736280 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 318418 (or 318414 counting only the distinct ones).

The product of its (nonzero) digits is 4032, while the sum is 29.

The square root of 12736280 is about 3568.7925128816. The cubic root of 12736280 is about 233.5326098064.

The spelling of 12736280 in words is "twelve million, seven hundred thirty-six thousand, two hundred eighty".