1385685188 has 12 divisors (see below), whose sum is σ = 2437514940. Its totient is φ = 689252352.

The previous prime is 1385685179. The next prime is 1385685199. The reversal of 1385685188 is 8815865831.

It can be written as a sum of positive squares in 2 ways, for example, as 372026944 + 1013658244 = 19288^2 + 31838^2 .

It is an unprimeable number.

It is a polite number, since it can be written in 3 ways as a sum of consecutive naturals, for example, 896693 + ... + 898236.

It is an arithmetic number, because the mean of its divisors is an integer number (203126245).

Almost surely, 2^1385685188 is an apocalyptic number.

It is an amenable number.

1385685188 is a deficient number, since it is larger than the sum of its proper divisors (1051829752).

1385685188 is a wasteful number, since it uses less digits than its factorization.

1385685188 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 1795126 (or 1795124 counting only the distinct ones).

The product of its digits is 1843200, while the sum is 53.

The square root of 1385685188 is about 37224.7926522096. The cubic root of 1385685188 is about 1114.8630578464.

The spelling of 1385685188 in words is "one billion, three hundred eighty-five million, six hundred eighty-five thousand, one hundred eighty-eight".