12784780 has 24 divisors (see below), whose sum is σ = 28016352. Its totient is φ = 4891392.

The previous prime is 12784771. The next prime is 12784787. The reversal of 12784780 is 8748721.

It is not an unprimeable number, because it can be changed into a prime (12784787) by changing a digit.

It is a polite number, since it can be written in 7 ways as a sum of consecutive naturals, for example, 13437 + ... + 14356.

It is an arithmetic number, because the mean of its divisors is an integer number (1167348).

Almost surely, 2^12784780 is an apocalyptic number.

12784780 is a gapful number since it is divisible by the number (10) formed by its first and last digit.

It is an amenable number.

12784780 is an abundant number, since it is smaller than the sum of its proper divisors (15231572).

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

12784780 is a wasteful number, since it uses less digits than its factorization.

12784780 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 27825 (or 27823 counting only the distinct ones).

The product of its (nonzero) digits is 25088, while the sum is 37.

The square root of 12784780 is about 3575.5810716581. The cubic root of 12784780 is about 233.8286665554.

The spelling of 12784780 in words is "twelve million, seven hundred eighty-four thousand, seven hundred eighty".