1386640876 has 12 divisors (see below), whose sum is σ = 2435577760. Its totient is φ = 690761520.

The previous prime is 1386640861. The next prime is 1386640907. The reversal of 1386640876 is 6780466831.

It is a hoax number, since the sum of its digits (49) coincides with the sum of the digits of its distinct prime factors.

It is an unprimeable number.

It is a pernicious number, because its binary representation contains a prime number (17) of ones.

It is a polite number, since it can be written in 3 ways as a sum of consecutive naturals, for example, 638511 + ... + 640678.

Almost surely, 2^1386640876 is an apocalyptic number.

It is an amenable number.

1386640876 is a deficient number, since it is larger than the sum of its proper divisors (1048936884).

1386640876 is a wasteful number, since it uses less digits than its factorization.

1386640876 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 1279464 (or 1279462 counting only the distinct ones).

The product of its (nonzero) digits is 1161216, while the sum is 49.

The square root of 1386640876 is about 37237.6271531901. The cubic root of 1386640876 is about 1115.1193008479.

The spelling of 1386640876 in words is "one billion, three hundred eighty-six million, six hundred forty thousand, eight hundred seventy-six".