389428205 has 4 divisors (see below), whose sum is σ = 467313852. Its totient is φ = 311542560.

The previous prime is 389428201. The next prime is 389428213. The reversal of 389428205 is 502824983.

It is a semiprime because it is the product of two primes.

It can be written as a sum of positive squares in 2 ways, for example, as 91278916 + 298149289 = 9554^2 + 17267^2 .

It is not a de Polignac number, because 389428205 - 2² = 389428201 is a prime.

It is a Duffinian number.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (389428201) by changing a digit.

It is a polite number, since it can be written in 3 ways as a sum of consecutive naturals, for example, 38942816 + ... + 38942825.

It is an arithmetic number, because the mean of its divisors is an integer number (116828463).

Almost surely, 2^389428205 is an apocalyptic number.

It is an amenable number.

389428205 is a deficient number, since it is larger than the sum of its proper divisors (77885647).

389428205 is an equidigital number, since it uses as much as digits as its factorization.

389428205 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 77885646.

The product of its (nonzero) digits is 138240, while the sum is 41.

The square root of 389428205 is about 19733.9353652534. The cubic root of 389428205 is about 730.2571215355.

The spelling of 389428205 in words is "three hundred eighty-nine million, four hundred twenty-eight thousand, two hundred five".