385681 has 8 divisors (see below), whose sum is σ = 414720. Its totient is φ = 357552.

The previous prime is 385663. The next prime is 385709. The reversal of 385681 is 186583.

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 385681 - 2¹¹ = 383633 is a prime.

It is a super-2 number, since 2×385681² = 297499667522, which contains 22 as substring.

It is a Duffinian number.

It is not an unprimeable number, because it can be changed into a prime (385621) 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, 816 + ... + 1198.

It is an arithmetic number, because the mean of its divisors is an integer number (51840).

2³⁸⁵⁶⁸¹ is an apocalyptic number.

It is an amenable number.

385681 is a deficient number, since it is larger than the sum of its proper divisors (29039).

385681 is a wasteful number, since it uses less digits than its factorization.

385681 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 455.

The product of its digits is 5760, while the sum is 31.

The square root of 385681 is about 621.0322052841. The cubic root of 385681 is about 72.7907311188.

The spelling of 385681 in words is "three hundred eighty-five thousand, six hundred eighty-one".