12978782 has 8 divisors (see below), whose sum is σ = 19496352. Its totient is φ = 6480000.

The previous prime is 12978773. The next prime is 12978809. The reversal of 12978782 is 28787921.

It is a sphenic number, since it is the product of 3 distinct primes.

It is a congruent number.

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 3 ways as a sum of consecutive naturals, for example, 2819 + ... + 5822.

It is an arithmetic number, because the mean of its divisors is an integer number (2437044).

Almost surely, 2^12978782 is an apocalyptic number.

12978782 is a deficient number, since it is larger than the sum of its proper divisors (6517570).

12978782 is an equidigital number, since it uses as much as digits as its factorization.

12978782 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 9394.

The product of its digits is 112896, while the sum is 44.

The square root of 12978782 is about 3602.6076666770. The cubic root of 12978782 is about 235.0054744462.

The spelling of 12978782 in words is "twelve million, nine hundred seventy-eight thousand, seven hundred eighty-two".