384506139 has 8 divisors (see below), whose sum is σ = 512765440. Its totient is φ = 256292136.

The previous prime is 384506137. The next prime is 384506191. The reversal of 384506139 is 931605483.

It is a sphenic number, since it is the product of 3 distinct primes.

It is not a de Polignac number, because 384506139 - 2¹ = 384506137 is a prime.

It is a Duffinian number.

It is a junction number, because it is equal to n+sod(n) for n = 384506097 and 384506106.

It is not an unprimeable number, because it can be changed into a prime (384506131) by changing a digit.

It is a polite number, since it can be written in 7 ways as a sum of consecutive naturals, for example, 27594 + ... + 39120.

It is an arithmetic number, because the mean of its divisors is an integer number (64095680).

Almost surely, 2^384506139 is an apocalyptic number.

384506139 is a deficient number, since it is larger than the sum of its proper divisors (128259301).

384506139 is a wasteful number, since it uses less digits than its factorization.

384506139 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 22649.

The product of its (nonzero) digits is 77760, while the sum is 39.

The square root of 384506139 is about 19608.8280883892. The cubic root of 384506139 is about 727.1674426232.

The spelling of 384506139 in words is "three hundred eighty-four million, five hundred six thousand, one hundred thirty-nine".