384928729 has 4 divisors (see below), whose sum is σ = 385363584. Its totient is φ = 384493876.

The previous prime is 384928721. The next prime is 384928751. The reversal of 384928729 is 927829483.

It is a semiprime because it is the product of two primes, and also a Blum integer, because the two primes are equal to 3 mod 4.

It is a cyclic number.

It is not a de Polignac number, because 384928729 - 2³ = 384928721 is a prime.

It is a Duffinian number.

It is not an unprimeable number, because it can be changed into a prime (384928721) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (17) of ones.

It is a polite number, since it can be written in 3 ways as a sum of consecutive naturals, for example, 216097 + ... + 217870.

It is an arithmetic number, because the mean of its divisors is an integer number (96340896).

Almost surely, 2^384928729 is an apocalyptic number.

It is an amenable number.

384928729 is a deficient number, since it is larger than the sum of its proper divisors (434855).

384928729 is an equidigital number, since it uses as much as digits as its factorization.

384928729 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 434854.

The product of its digits is 1741824, while the sum is 52.

The square root of 384928729 is about 19619.6006330404. The cubic root of 384928729 is about 727.4337419532.

The spelling of 384928729 in words is "three hundred eighty-four million, nine hundred twenty-eight thousand, seven hundred twenty-nine".