385689 has 4 divisors (see below), whose sum is σ = 514256. Its totient is φ = 257124.

The previous prime is 385663. The next prime is 385709. The reversal of 385689 is 986583.

It is a semiprime because it is the product of two primes, and also a Blum integer, because the two primes are equal to 3 mod 4.

It is not a de Polignac number, because 385689 - 2⁵ = 385657 is a prime.

It is a D-number.

It is a Duffinian number.

It is not an unprimeable number, because it can be changed into a prime (385639) by changing a digit.

It is a polite number, since it can be written in 3 ways as a sum of consecutive naturals, for example, 64279 + ... + 64284.

It is an arithmetic number, because the mean of its divisors is an integer number (128564).

2³⁸⁵⁶⁸⁹ is an apocalyptic number.

It is an amenable number.

385689 is a deficient number, since it is larger than the sum of its proper divisors (128567).

385689 is a wasteful number, since it uses less digits than its factorization.

385689 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 128566.

The product of its digits is 51840, while the sum is 39.

The square root of 385689 is about 621.0386461405. The cubic root of 385689 is about 72.7912344033.

The spelling of 385689 in words is "three hundred eighty-five thousand, six hundred eighty-nine".