389328481 has 4 divisors (see below), whose sum is σ = 389907652. Its totient is φ = 388749312.

The previous prime is 389328469. The next prime is 389328517. The reversal of 389328481 is 184823983.

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 43033600 + 346294881 = 6560^2 + 18609^2 .

It is a cyclic number.

It is not a de Polignac number, because 389328481 - 2²⁷ = 255110753 is a prime.

It is a super-2 number, since 2×389328481² = 303153332235534722, which contains 22 as substring.

It is a Duffinian number.

It is not an unprimeable number, because it can be changed into a prime (389328421) 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, 288576 + ... + 289921.

It is an arithmetic number, because the mean of its divisors is an integer number (97476913).

Almost surely, 2^389328481 is an apocalyptic number.

It is an amenable number.

389328481 is a deficient number, since it is larger than the sum of its proper divisors (579171).

389328481 is an equidigital number, since it uses as much as digits as its factorization.

389328481 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 579170.

The product of its digits is 331776, while the sum is 46.

The square root of 389328481 is about 19731.4084900192. The cubic root of 389328481 is about 730.1947819503.

The spelling of 389328481 in words is "three hundred eighty-nine million, three hundred twenty-eight thousand, four hundred eighty-one".