385204391 has 16 divisors (see below), whose sum is σ = 472227840. Its totient is φ = 309191520.

The previous prime is 385204331. The next prime is 385204397. The reversal of 385204391 is 193402583.

It is not a de Polignac number, because 385204391 - 2¹⁰ = 385203367 is a prime.

It is a Duffinian number.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (385204397) 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, 55271 + ... + 61848.

It is an arithmetic number, because the mean of its divisors is an integer number (29514240).

Almost surely, 2^385204391 is an apocalyptic number.

385204391 is a deficient number, since it is larger than the sum of its proper divisors (87023449).

385204391 is a wasteful number, since it uses less digits than its factorization.

385204391 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 117166.

The product of its (nonzero) digits is 25920, while the sum is 35.

The square root of 385204391 is about 19626.6245442256. The cubic root of 385204391 is about 727.6073481094.

The spelling of 385204391 in words is "three hundred eighty-five million, two hundred four thousand, three hundred ninety-one".