1385665836 has 48 divisors (see below), whose sum is σ = 3351753216. Its totient is φ = 445189824.

The previous prime is 1385665783. The next prime is 1385665837. The reversal of 1385665836 is 6385665831.

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 in 15 ways as a sum of consecutive naturals, for example, 32925 + ... + 62091.

It is an arithmetic number, because the mean of its divisors is an integer number (69828192).

Almost surely, 2^1385665836 is an apocalyptic number.

It is an amenable number.

1385665836 is an abundant number, since it is smaller than the sum of its proper divisors (1966087380).

It is a pseudoperfect number, because it is the sum of a subset of its proper divisors.

1385665836 is a wasteful number, since it uses less digits than its factorization.

1385665836 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 29318 (or 29316 counting only the distinct ones).

The product of its digits is 3110400, while the sum is 51.

The square root of 1385665836 is about 37224.5327170134. The cubic root of 1385665836 is about 1114.8578678916.

The spelling of 1385665836 in words is "one billion, three hundred eighty-five million, six hundred sixty-five thousand, eight hundred thirty-six".