385517839 has 12 divisors (see below), whose sum is σ = 450397584. Its totient is φ = 329015904.

The previous prime is 385517831. The next prime is 385517843. The reversal of 385517839 is 938715583.

It is not a de Polignac number, because 385517839 - 2³ = 385517831 is a prime.

It is a Harshad number since it is a multiple of its sum of digits (49).

It is a junction number, because it is equal to n+sod(n) for n = 385517792 and 385517801.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (385517831) by changing a digit.

It is a polite number, since it can be written in 11 ways as a sum of consecutive naturals, for example, 5467 + ... + 28300.

It is an arithmetic number, because the mean of its divisors is an integer number (37533132).

Almost surely, 2^385517839 is an apocalyptic number.

385517839 is a deficient number, since it is larger than the sum of its proper divisors (64879745).

385517839 is a wasteful number, since it uses less digits than its factorization.

385517839 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 34014 (or 34007 counting only the distinct ones).

The product of its digits is 907200, while the sum is 49.

The square root of 385517839 is about 19634.6081957344. The cubic root of 385517839 is about 727.8046504944.

The spelling of 385517839 in words is "three hundred eighty-five million, five hundred seventeen thousand, eight hundred thirty-nine".