384402220 has 48 divisors (see below), whose sum is σ = 845365248. Its totient is φ = 146548160.

The previous prime is 384402217. The next prime is 384402223. The reversal of 384402220 is 22204483.

It is an interprime number because it is at equal distance from previous prime (384402217) and next prime (384402223).

It is not an unprimeable number, because it can be changed into a prime (384402223) 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, 141717 + ... + 144403.

It is an arithmetic number, because the mean of its divisors is an integer number (17611776).

Almost surely, 2^384402220 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 384402220, and also a Zumkeller number, because its divisors can be partitioned in two sets with the same sum (422682624).

384402220 is an abundant number, since it is smaller than the sum of its proper divisors (460963028).

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

384402220 is a wasteful number, since it uses less digits than its factorization.

384402220 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 3030 (or 3028 counting only the distinct ones).

The product of its (nonzero) digits is 3072, while the sum is 25.

The square root of 384402220 is about 19606.1781079332. The cubic root of 384402220 is about 727.1019271350.

The spelling of 384402220 in words is "three hundred eighty-four million, four hundred two thousand, two hundred twenty".