1386939789 has 36 divisors (see below), whose sum is σ = 2128884160. Its totient is φ = 867684960.

The previous prime is 1386939707. The next prime is 1386939791. The reversal of 1386939789 is 9879396831.

1386939789 is a `hidden beast` number, since 1 + 386 + 93 + 97 + 89 = 666.

It is not a de Polignac number, because 1386939789 - 2²⁵ = 1353385357 is a prime.

It is a super-2 number, since 2×1386939789² = 3847203956622729042, which contains 22 as substring.

It is a Duffinian number.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (1386939289) by changing a digit.

It is a polite number, since it can be written in 35 ways as a sum of consecutive naturals, for example, 5117724 + ... + 5117994.

Almost surely, 2^1386939789 is an apocalyptic number.

1386939789 is a gapful number since it is divisible by the number (19) formed by its first and last digit.

It is an amenable number.

1386939789 is a deficient number, since it is larger than the sum of its proper divisors (741944371).

1386939789 is a wasteful number, since it uses less digits than its factorization.

1386939789 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 642 (or 466 counting only the distinct ones).

The product of its digits is 17635968, while the sum is 63.

The square root of 1386939789 is about 37241.6405250897. The cubic root of 1386939789 is about 1115.1994224601.

The spelling of 1386939789 in words is "one billion, three hundred eighty-six million, nine hundred thirty-nine thousand, seven hundred eighty-nine".