12684780 has 72 divisors (see below), whose sum is σ = 40513200. Its totient is φ = 3203712.

The previous prime is 12684773. The next prime is 12684781. The reversal of 12684780 is 8748621.

12684780 is digitally balanced in base 2, because in such base it contains all the possibile digits an equal number of times.

It is a Harshad number since it is a multiple of its sum of digits (36).

It is not an unprimeable number, because it can be changed into a prime (12684781) by changing a digit.

It is a polite number, since it can be written in 23 ways as a sum of consecutive naturals, for example, 1566 + ... + 5274.

Almost surely, 2^12684780 is an apocalyptic number.

12684780 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 12684780, and also a Zumkeller number, because its divisors can be partitioned in two sets with the same sum (20256600).

12684780 is an abundant number, since it is smaller than the sum of its proper divisors (27828420).

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

12684780 is a wasteful number, since it uses less digits than its factorization.

12684780 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 3743 (or 3738 counting only the distinct ones).

The product of its (nonzero) digits is 21504, while the sum is 36.

The square root of 12684780 is about 3561.5698785788. The cubic root of 12684780 is about 233.2174163464.

The spelling of 12684780 in words is "twelve million, six hundred eighty-four thousand, seven hundred eighty".