1386939786 has 16 divisors (see below), whose sum is σ = 2820895200. Its totient is φ = 454477328.

The previous prime is 1386939707. The next prime is 1386939791. The reversal of 1386939786 is 6879396831.

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 7 ways as a sum of consecutive naturals, for example, 1958601 + ... + 1959308.

It is an arithmetic number, because the mean of its divisors is an integer number (176305950).

Almost surely, 2^1386939786 is an apocalyptic number.

1386939786 is an abundant number, since it is smaller than the sum of its proper divisors (1433955414).

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

1386939786 is a wasteful number, since it uses less digits than its factorization.

1386939786 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 3917973.

The product of its digits is 11757312, while the sum is 60.

The square root of 1386939786 is about 37241.6404848122. The cubic root of 1386939786 is about 1115.1994216560.

The spelling of 1386939786 in words is "one billion, three hundred eighty-six million, nine hundred thirty-nine thousand, seven hundred eighty-six".