389218285 has 8 divisors (see below), whose sum is σ = 467167896. Its totient is φ = 311304000.

The previous prime is 389218283. The next prime is 389218337. The reversal of 389218285 is 582812983.

It can be written as a sum of positive squares in 4 ways, for example, as 6702921 + 382515364 = 2589^2 + 19558^2 .

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

It is not a de Polignac number, because 389218285 - 2¹ = 389218283 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 (389218283) 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, 37927 + ... + 47083.

It is an arithmetic number, because the mean of its divisors is an integer number (58395987).

Almost surely, 2^389218285 is an apocalyptic number.

It is an amenable number.

389218285 is a deficient number, since it is larger than the sum of its proper divisors (77949611).

389218285 is an equidigital number, since it uses as much as digits as its factorization.

389218285 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 17663.

The product of its digits is 276480, while the sum is 46.

The square root of 389218285 is about 19728.6158916433. The cubic root of 389218285 is about 730.1258837141.

The spelling of 389218285 in words is "three hundred eighty-nine million, two hundred eighteen thousand, two hundred eighty-five".