384221538 has 24 divisors (see below), whose sum is σ = 833429376. Its totient is φ = 127927800.

The previous prime is 384221503. The next prime is 384221549. The reversal of 384221538 is 835122483.

384221538 is a `hidden beast` number, since 384 + 221 + 53 + 8 = 666.

It is an unprimeable number.

It is a polite number, since it can be written in 11 ways as a sum of consecutive naturals, for example, 4683 + ... + 28113.

It is an arithmetic number, because the mean of its divisors is an integer number (34726224).

Almost surely, 2^384221538 is an apocalyptic number.

384221538 is an abundant number, since it is smaller than the sum of its proper divisors (449207838).

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

384221538 is a wasteful number, since it uses less digits than its factorization.

384221538 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 24350 (or 24347 counting only the distinct ones).

The product of its digits is 46080, while the sum is 36.

The square root of 384221538 is about 19601.5697840760. The cubic root of 384221538 is about 726.9879884770.

The spelling of 384221538 in words is "three hundred eighty-four million, two hundred twenty-one thousand, five hundred thirty-eight".