685205385 has 8 divisors (see below), whose sum is σ = 1096328640. Its totient is φ = 365442864.

The previous prime is 685205267. The next prime is 685205399. The reversal of 685205385 is 583502586.

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

It is not a de Polignac number, because 685205385 - 2¹⁰ = 685204361 is a prime.

It is an unprimeable number.

It is a polite number, since it can be written in 7 ways as a sum of consecutive naturals, for example, 22840165 + ... + 22840194.

It is an arithmetic number, because the mean of its divisors is an integer number (137041080).

Almost surely, 2^685205385 is an apocalyptic number.

It is an amenable number.

685205385 is a deficient number, since it is larger than the sum of its proper divisors (411123255).

685205385 is a wasteful number, since it uses less digits than its factorization.

685205385 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 45680367.

The product of its (nonzero) digits is 288000, while the sum is 42.

The square root of 685205385 is about 26176.4280412741. The cubic root of 685205385 is about 881.6040754131.

The spelling of 685205385 in words is "six hundred eighty-five million, two hundred five thousand, three hundred eighty-five".