385669 has 4 divisors (see below), whose sum is σ = 389196. Its totient is φ = 382144.

The previous prime is 385663. The next prime is 385709. The reversal of 385669 is 966583.

It is a semiprime because it is the product of two primes.

It can be written as a sum of positive squares in 2 ways, for example, as 172225 + 213444 = 415^2 + 462^2 .

It is a cyclic number.

It is not a de Polignac number, because 385669 - 2³ = 385661 is a prime.

It is a super-2 number, since 2×385669² = 297481155122, which contains 22 as substring.

It is a Duffinian number.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (385661) 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, 1594 + ... + 1819.

It is an arithmetic number, because the mean of its divisors is an integer number (97299).

2³⁸⁵⁶⁶⁹ is an apocalyptic number.

It is an amenable number.

385669 is a deficient number, since it is larger than the sum of its proper divisors (3527).

385669 is a wasteful number, since it uses less digits than its factorization.

385669 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 3526.

The product of its digits is 38880, while the sum is 37.

The square root of 385669 is about 621.0225438742. The cubic root of 385669 is about 72.7899761790.

The spelling of 385669 in words is "three hundred eighty-five thousand, six hundred sixty-nine".