389685557 has 8 divisors (see below), whose sum is σ = 403379040. Its totient is φ = 376009200.

The previous prime is 389685553. The next prime is 389685563. The reversal of 389685557 is 755586983.

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 389685557 - 2² = 389685553 is a prime.

It is a Duffinian number.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (389685553) 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, 57182 + ... + 63632.

It is an arithmetic number, because the mean of its divisors is an integer number (50422380).

Almost surely, 2^389685557 is an apocalyptic number.

It is an amenable number.

389685557 is a deficient number, since it is larger than the sum of its proper divisors (13693483).

389685557 is a wasteful number, since it uses less digits than its factorization.

389685557 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 8563.

The product of its digits is 9072000, while the sum is 56.

The square root of 389685557 is about 19740.4548326527. The cubic root of 389685557 is about 730.4179485680.

The spelling of 389685557 in words is "three hundred eighty-nine million, six hundred eighty-five thousand, five hundred fifty-seven".