12900784 has 40 divisors (see below), whose sum is σ = 27151040. Its totient is φ = 5937984.

The previous prime is 12900757. The next prime is 12900793. The reversal of 12900784 is 48700921.

It is an unprimeable number.

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 7 ways as a sum of consecutive naturals, for example, 34969 + ... + 35335.

It is an arithmetic number, because the mean of its divisors is an integer number (678776).

Almost surely, 2^12900784 is an apocalyptic number.

It is an amenable number.

It is a practical number, because each smaller number is the sum of distinct divisors of 12900784, and also a Zumkeller number, because its divisors can be partitioned in two sets with the same sum (13575520).

12900784 is an abundant number, since it is smaller than the sum of its proper divisors (14250256).

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

12900784 is an equidigital number, since it uses as much as digits as its factorization.

12900784 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 414 (or 382 counting only the distinct ones).

The product of its (nonzero) digits is 4032, while the sum is 31.

The square root of 12900784 is about 3591.7661393805. The cubic root of 12900784 is about 234.5337609734.

The spelling of 12900784 in words is "twelve million, nine hundred thousand, seven hundred eighty-four".