1385665832 has 8 divisors (see below), whose sum is σ = 2598123450. Its totient is φ = 692832912.

The previous prime is 1385665783. The next prime is 1385665837. The reversal of 1385665832 is 2385665831.

It can be written as a sum of positive squares in only one way, i.e., 948270436 + 437395396 = 30794^2 + 20914^2 .

It is a tau number, because it is divible by the number of its divisors (8).

It is not an unprimeable number, because it can be changed into a prime (1385665837) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 86604107 + ... + 86604122.

Almost surely, 2^1385665832 is an apocalyptic number.

It is an amenable number.

1385665832 is a deficient number, since it is larger than the sum of its proper divisors (1212457618).

1385665832 is a wasteful number, since it uses less digits than its factorization.

1385665832 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 173208235 (or 173208231 counting only the distinct ones).

The product of its digits is 1036800, while the sum is 47.

The square root of 1385665832 is about 37224.5326632854. The cubic root of 1385665832 is about 1114.8578668189.

Subtracting 1385665832 from its reverse (2385665831), we obtain a palindrome (999999999).

The spelling of 1385665832 in words is "one billion, three hundred eighty-five million, six hundred sixty-five thousand, eight hundred thirty-two".