384643720 has 64 divisors (see below), whose sum is σ = 909169920. Its totient is φ = 146175744.

The previous prime is 384643711. The next prime is 384643741. The reversal of 384643720 is 27346483.

It is a happy number.

It is a self number, because there is not a number n which added to its sum of digits gives 384643720.

It is an unprimeable number.

It is a polite number, since it can be written in 15 ways as a sum of consecutive naturals, for example, 143109 + ... + 145771.

It is an arithmetic number, because the mean of its divisors is an integer number (14205780).

Almost surely, 2^384643720 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 384643720, and also a Zumkeller number, because its divisors can be partitioned in two sets with the same sum (454584960).

384643720 is an abundant number, since it is smaller than the sum of its proper divisors (524526200).

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

384643720 is a wasteful number, since it uses less digits than its factorization.

384643720 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 2854 (or 2850 counting only the distinct ones).

The product of its (nonzero) digits is 96768, while the sum is 37.

The square root of 384643720 is about 19612.3359139089. The cubic root of 384643720 is about 727.2541620829.

The spelling of 384643720 in words is "three hundred eighty-four million, six hundred forty-three thousand, seven hundred twenty".