1385123812 has 12 divisors (see below), whose sum is σ = 2447501056. Its totient is φ = 685837800.

The previous prime is 1385123737. The next prime is 1385123813. The reversal of 1385123812 is 2183215831.

It is a super-2 number, since 2×1385123812² = 3837135949138822688, which contains 22 as substring.

It is a hoax number, since the sum of its digits (34) coincides with the sum of the digits of its distinct prime factors.

It is not an unprimeable number, because it can be changed into a prime (1385123813) 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 3 ways as a sum of consecutive naturals, for example, 1680564 + ... + 1681387.

Almost surely, 2^1385123812 is an apocalyptic number.

It is an amenable number.

1385123812 is a deficient number, since it is larger than the sum of its proper divisors (1062377244).

1385123812 is a wasteful number, since it uses less digits than its factorization.

1385123812 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 3362058 (or 3362056 counting only the distinct ones).

The product of its digits is 11520, while the sum is 34.

The square root of 1385123812 is about 37217.2515374255. The cubic root of 1385123812 is about 1114.7124844681.

The spelling of 1385123812 in words is "one billion, three hundred eighty-five million, one hundred twenty-three thousand, eight hundred twelve".