389471581 has 16 divisors (see below), whose sum is σ = 431481600. Its totient is φ = 349671168.

The previous prime is 389471573. The next prime is 389471611. The reversal of 389471581 is 185174983.

It is a happy number.

It is a cyclic number.

It is not a de Polignac number, because 389471581 - 2³ = 389471573 is a prime.

It is a super-2 number, since 2×389471581² = 303376224813279122, which contains 22 as substring.

It is a Duffinian number.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (389471881) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (19) of ones.

It is a polite number, since it can be written in 15 ways as a sum of consecutive naturals, for example, 170515 + ... + 172783.

It is an arithmetic number, because the mean of its divisors is an integer number (26967600).

Almost surely, 2^389471581 is an apocalyptic number.

It is an amenable number.

389471581 is a deficient number, since it is larger than the sum of its proper divisors (42010019).

389471581 is a wasteful number, since it uses less digits than its factorization.

389471581 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 2748.

The product of its digits is 241920, while the sum is 46.

The square root of 389471581 is about 19735.0343551766. The cubic root of 389471581 is about 730.2842334709.

The spelling of 389471581 in words is "three hundred eighty-nine million, four hundred seventy-one thousand, five hundred eighty-one".