385228911 has 4 divisors (see below), whose sum is σ = 513638552. Its totient is φ = 256819272.

The previous prime is 385228903. The next prime is 385228913. The reversal of 385228911 is 119822583.

It is a semiprime because it is the product of two primes.

It is not a de Polignac number, because 385228911 - 2³ = 385228903 is a prime.

It is a Duffinian number.

It is a self number, because there is not a number n which added to its sum of digits gives 385228911.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (385228913) by changing a digit.

It is a polite number, since it can be written in 3 ways as a sum of consecutive naturals, for example, 64204816 + ... + 64204821.

It is an arithmetic number, because the mean of its divisors is an integer number (128409638).

Almost surely, 2^385228911 is an apocalyptic number.

385228911 is a deficient number, since it is larger than the sum of its proper divisors (128409641).

385228911 is a wasteful number, since it uses less digits than its factorization.

385228911 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 128409640.

The product of its digits is 34560, while the sum is 39.

The square root of 385228911 is about 19627.2491959520. The cubic root of 385228911 is about 727.6227862803.

The spelling of 385228911 in words is "three hundred eighty-five million, two hundred twenty-eight thousand, nine hundred eleven".