1388680659 has 32 divisors (see below), whose sum is σ = 2132567040. Its totient is φ = 892511136.

The previous prime is 1388680627. The next prime is 1388680661. The reversal of 1388680659 is 9560868831.

It is not a de Polignac number, because 1388680659 - 2⁵ = 1388680627 is a prime.

It is not an unprimeable number, because it can be changed into a prime (1388680609) by changing a digit.

It is a polite number, since it can be written in 31 ways as a sum of consecutive naturals, for example, 76857 + ... + 93189.

It is an arithmetic number, because the mean of its divisors is an integer number (66642720).

Almost surely, 2^1388680659 is an apocalyptic number.

1388680659 is a deficient number, since it is larger than the sum of its proper divisors (743886381).

1388680659 is a wasteful number, since it uses less digits than its factorization.

1388680659 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 16456 (or 16450 counting only the distinct ones).

The product of its (nonzero) digits is 2488320, while the sum is 54.

The square root of 1388680659 is about 37265.0058231580. The cubic root of 1388680659 is about 1115.6658223040.

The spelling of 1388680659 in words is "one billion, three hundred eighty-eight million, six hundred eighty thousand, six hundred fifty-nine".