385434855 has 80 divisors (see below), whose sum is σ = 783441120. Its totient is φ = 179718912.

The previous prime is 385434823. The next prime is 385434869. The reversal of 385434855 is 558434583.

It is not a de Polignac number, because 385434855 - 2⁵ = 385434823 is a prime.

It is a Harshad number since it is a multiple of its sum of digits (45).

It is a self number, because there is not a number n which added to its sum of digits gives 385434855.

It is a congruent number.

It is an unprimeable number.

It is a pernicious number, because its binary representation contains a prime number (17) of ones.

It is a polite number, since it can be written in 79 ways as a sum of consecutive naturals, for example, 98109 + ... + 101961.

It is an arithmetic number, because the mean of its divisors is an integer number (9793014).

Almost surely, 2^385434855 is an apocalyptic number.

385434855 is an abundant number, since it is smaller than the sum of its proper divisors (398006265).

It is a pseudoperfect number, because it is the sum of a subset of its proper divisors.

385434855 is a wasteful number, since it uses less digits than its factorization.

385434855 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 3902 (or 3893 counting only the distinct ones).

The product of its digits is 1152000, while the sum is 45.

The square root of 385434855 is about 19632.4948745696. The cubic root of 385434855 is about 727.7524259547.

The spelling of 385434855 in words is "three hundred eighty-five million, four hundred thirty-four thousand, eight hundred fifty-five".