1385208507 has 24 divisors (see below), whose sum is σ = 1891607536. Its totient is φ = 901490688.

The previous prime is 1385208499. The next prime is 1385208521. The reversal of 1385208507 is 7058025831.

It is not a de Polignac number, because 1385208507 - 2³ = 1385208499 is a prime.

It is not an unprimeable number, because it can be changed into a prime (1385208527) by changing a digit.

It is a polite number, since it can be written in 23 ways as a sum of consecutive naturals, for example, 4110243 + ... + 4110579.

Almost surely, 2^1385208507 is an apocalyptic number.

1385208507 is a deficient number, since it is larger than the sum of its proper divisors (506399029).

1385208507 is an equidigital number, since it uses as much as digits as its factorization.

1385208507 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 687 (or 550 counting only the distinct ones).

The product of its (nonzero) digits is 67200, while the sum is 39.

The square root of 1385208507 is about 37218.3893660110. The cubic root of 1385208507 is about 1114.7352041338.

The spelling of 1385208507 in words is "one billion, three hundred eighty-five million, two hundred eight thousand, five hundred seven".