384780085 has 16 divisors (see below), whose sum is σ = 468179712. Its totient is φ = 303552000.

The previous prime is 384780083. The next prime is 384780089. The reversal of 384780085 is 580087483.

It is a happy number.

It is not a de Polignac number, because 384780085 - 2¹ = 384780083 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 (384780083) 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, 149560 + ... + 152110.

It is an arithmetic number, because the mean of its divisors is an integer number (29261232).

Almost surely, 2^384780085 is an apocalyptic number.

It is an amenable number.

384780085 is a deficient number, since it is larger than the sum of its proper divisors (83399627).

384780085 is a wasteful number, since it uses less digits than its factorization.

384780085 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 2964.

The product of its (nonzero) digits is 215040, while the sum is 43.

The square root of 384780085 is about 19615.8121167593. The cubic root of 384780085 is about 727.3400946757.

The spelling of 384780085 in words is "three hundred eighty-four million, seven hundred eighty thousand, eighty-five".