384391404 has 72 divisors (see below), whose sum is σ = 1024274160. Its totient is φ = 121360512.

The previous prime is 384391393. The next prime is 384391417. The reversal of 384391404 is 404193483.

It is a Harshad number since it is a multiple of its sum of digits (36).

It is an unprimeable number.

It is a polite number, since it can be written in 23 ways as a sum of consecutive naturals, for example, 51859 + ... + 58805.

It is an arithmetic number, because the mean of its divisors is an integer number (14226030).

Almost surely, 2^384391404 is an apocalyptic number.

It is an amenable number.

It is a practical number, because each smaller number is the sum of distinct divisors of 384391404, and also a Zumkeller number, because its divisors can be partitioned in two sets with the same sum (512137080).

384391404 is an abundant number, since it is smaller than the sum of its proper divisors (639882756).

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

384391404 is a wasteful number, since it uses less digits than its factorization.

384391404 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 7039 (or 7034 counting only the distinct ones).

The product of its (nonzero) digits is 41472, while the sum is 36.

The square root of 384391404 is about 19605.9022745703. The cubic root of 384391404 is about 727.0951075350.

The spelling of 384391404 in words is "three hundred eighty-four million, three hundred ninety-one thousand, four hundred four".