385845209 has 8 divisors (see below), whose sum is σ = 408719520. Its totient is φ = 362990656.

The previous prime is 385845199. The next prime is 385845221. The reversal of 385845209 is 902548583.

It is a sphenic number, since it is the product of 3 distinct primes.

It is a cyclic number.

It is not a de Polignac number, because 385845209 - 2²⁸ = 117409753 is a prime.

It is a Duffinian number.

It is a Curzon number.

It is a self number, because there is not a number n which added to its sum of digits gives 385845209.

It is not an unprimeable number, because it can be changed into a prime (385845259) by changing a digit.

It is a polite number, since it can be written in 7 ways as a sum of consecutive naturals, for example, 59102 + ... + 65304.

It is an arithmetic number, because the mean of its divisors is an integer number (51089940).

Almost surely, 2^385845209 is an apocalyptic number.

It is an amenable number.

385845209 is a deficient number, since it is larger than the sum of its proper divisors (22874311).

385845209 is a wasteful number, since it uses less digits than its factorization.

385845209 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 9879.

The product of its (nonzero) digits is 345600, while the sum is 44.

The square root of 385845209 is about 19642.9429821501. The cubic root of 385845209 is about 728.0106020525.

The spelling of 385845209 in words is "three hundred eighty-five million, eight hundred forty-five thousand, two hundred nine".