389005581 has 8 divisors (see below), whose sum is σ = 531324864. Its totient is φ = 253011680.

The previous prime is 389005567. The next prime is 389005583. The reversal of 389005581 is 185500983.

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

It is a cyclic number.

It is not a de Polignac number, because 389005581 - 2⁵ = 389005549 is a prime.

It is a super-2 number, since 2×389005581² = 302650684098295122, which contains 22 as substring.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (389005583) 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, 1581201 + ... + 1581446.

It is an arithmetic number, because the mean of its divisors is an integer number (66415608).

Almost surely, 2^389005581 is an apocalyptic number.

It is an amenable number.

389005581 is a deficient number, since it is larger than the sum of its proper divisors (142319283).

389005581 is a wasteful number, since it uses less digits than its factorization.

389005581 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 3162691.

The product of its (nonzero) digits is 43200, while the sum is 39.

The square root of 389005581 is about 19723.2244067749. The cubic root of 389005581 is about 729.9928572517.

The spelling of 389005581 in words is "three hundred eighty-nine million, five thousand, five hundred eighty-one".