1385688387 has 16 divisors (see below), whose sum is σ = 1868509440. Its totient is φ = 913356000.

The previous prime is 1385688379. The next prime is 1385688391. The reversal of 1385688387 is 7838865831.

It is not a de Polignac number, because 1385688387 - 2³ = 1385688379 is a prime.

It is not an unprimeable number, because it can be changed into a prime (1385684387) by changing a digit.

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 15 ways as a sum of consecutive naturals, for example, 242914 + ... + 248552.

It is an arithmetic number, because the mean of its divisors is an integer number (116781840).

Almost surely, 2^1385688387 is an apocalyptic number.

1385688387 is a deficient number, since it is larger than the sum of its proper divisors (482821053).

1385688387 is a wasteful number, since it uses less digits than its factorization.

1385688387 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 6554.

The product of its digits is 7741440, while the sum is 57.

The square root of 1385688387 is about 37224.8356208594. The cubic root of 1385688387 is about 1114.8639157719.

The spelling of 1385688387 in words is "one billion, three hundred eighty-five million, six hundred eighty-eight thousand, three hundred eighty-seven".