389315505 has 8 divisors (see below), whose sum is σ = 622904832. Its totient is φ = 207634928.

The previous prime is 389315501. The next prime is 389315519. The reversal of 389315505 is 505513983.

It is a happy number.

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 389315505 - 2² = 389315501 is a prime.

It is a Curzon number.

It is not an unprimeable number, because it can be changed into a prime (389315501) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (17) of ones.

It is a polite number, since it can be written in 7 ways as a sum of consecutive naturals, for example, 12977169 + ... + 12977198.

It is an arithmetic number, because the mean of its divisors is an integer number (77863104).

Almost surely, 2^389315505 is an apocalyptic number.

It is an amenable number.

389315505 is a deficient number, since it is larger than the sum of its proper divisors (233589327).

389315505 is a wasteful number, since it uses less digits than its factorization.

389315505 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 25954375.

The product of its (nonzero) digits is 81000, while the sum is 39.

The square root of 389315505 is about 19731.0796714219. The cubic root of 389315505 is about 730.1866695952.

The spelling of 389315505 in words is "three hundred eighty-nine million, three hundred fifteen thousand, five hundred five".