1386939788 has 12 divisors (see below), whose sum is σ = 2613848160. Its totient is φ = 640126032.

The previous prime is 1386939707. The next prime is 1386939791. The reversal of 1386939788 is 8879396831.

It is a self number, because there is not a number n which added to its sum of digits gives 1386939788.

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, 13335908 + ... + 13336011.

It is an arithmetic number, because the mean of its divisors is an integer number (217820680).

Almost surely, 2^1386939788 is an apocalyptic number.

It is an amenable number.

1386939788 is a deficient number, since it is larger than the sum of its proper divisors (1226908372).

1386939788 is a wasteful number, since it uses less digits than its factorization.

1386939788 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 26671936 (or 26671934 counting only the distinct ones).

The product of its digits is 15676416, while the sum is 62.

The square root of 1386939788 is about 37241.6405116638. The cubic root of 1386939788 is about 1115.1994221920.

The spelling of 1386939788 in words is "one billion, three hundred eighty-six million, nine hundred thirty-nine thousand, seven hundred eighty-eight".