12722780 has 48 divisors (see below), whose sum is σ = 32148480. Its totient is φ = 4131648.

The previous prime is 12722771. The next prime is 12722791. The reversal of 12722780 is 8722721.

It is a congruent number.

It is an unprimeable number.

It is a polite number, since it can be written in 15 ways as a sum of consecutive naturals, for example, 269 + ... + 5051.

It is an arithmetic number, because the mean of its divisors is an integer number (669760).

Almost surely, 2^12722780 is an apocalyptic number.

12722780 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 12722780, and also a Zumkeller number, because its divisors can be partitioned in two sets with the same sum (16074240).

12722780 is an abundant number, since it is smaller than the sum of its proper divisors (19425700).

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

12722780 is a wasteful number, since it uses less digits than its factorization.

12722780 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 4818 (or 4816 counting only the distinct ones).

The product of its (nonzero) digits is 3136, while the sum is 29.

The square root of 12722780 is about 3566.9006153802. The cubic root of 12722780 is about 233.4500685725.

The spelling of 12722780 in words is "twelve million, seven hundred twenty-two thousand, seven hundred eighty".