389407217 has 16 divisors (see below), whose sum is σ = 405506304. Its totient is φ = 373680000.

The previous prime is 389407211. The next prime is 389407229. The reversal of 389407217 is 712704983.

It is a cyclic number.

It is not a de Polignac number, because 389407217 - 2²⁸ = 120971761 is a prime.

It is a Harshad number since it is a multiple of its sum of digits (41).

It is a Duffinian number.

It is not an unprimeable number, because it can be changed into a prime (389407211) 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 15 ways as a sum of consecutive naturals, for example, 1122038 + ... + 1122384.

It is an arithmetic number, because the mean of its divisors is an integer number (25344144).

Almost surely, 2^389407217 is an apocalyptic number.

It is an amenable number.

389407217 is a deficient number, since it is larger than the sum of its proper divisors (16099087).

389407217 is a wasteful number, since it uses less digits than its factorization.

389407217 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 760.

The product of its (nonzero) digits is 84672, while the sum is 41.

The square root of 389407217 is about 19733.4035837714. The cubic root of 389407217 is about 730.2440023764.

The spelling of 389407217 in words is "three hundred eighty-nine million, four hundred seven thousand, two hundred seventeen".