12777938 has 8 divisors (see below), whose sum is σ = 19189632. Its totient is φ = 6381396.

The previous prime is 12777917. The next prime is 12777943. The reversal of 12777938 is 83977721.

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

It is an unprimeable number.

It is a pernicious number, because its binary representation contains a prime number (13) of ones.

It is a polite number, since it can be written in 3 ways as a sum of consecutive naturals, for example, 1370 + ... + 5237.

It is an arithmetic number, because the mean of its divisors is an integer number (2398704).

Almost surely, 2^12777938 is an apocalyptic number.

12777938 is a deficient number, since it is larger than the sum of its proper divisors (6411694).

12777938 is an equidigital number, since it uses as much as digits as its factorization.

12777938 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 7576.

The product of its digits is 148176, while the sum is 44.

The square root of 12777938 is about 3574.6241760498. The cubic root of 12777938 is about 233.7869466035.

The spelling of 12777938 in words is "twelve million, seven hundred seventy-seven thousand, nine hundred thirty-eight".