385931 has 8 divisors (see below), whose sum is σ = 475104. Its totient is φ = 305280.

The previous prime is 385927. The next prime is 385939. The reversal of 385931 is 139583.

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 385931 - 2² = 385927 is a prime.

It is a super-2 number, since 2×385931² = 297885473522, which contains 22 as substring.

It is a nialpdrome in base 5.

It is a junction number, because it is equal to n+sod(n) for n = 385894 and 385903.

It is not an unprimeable number, because it can be changed into a prime (385939) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (11) of ones.

It is a polite number, since it can be written in 7 ways as a sum of consecutive naturals, for example, 2030 + ... + 2211.

It is an arithmetic number, because the mean of its divisors is an integer number (59388).

2³⁸⁵⁹³¹ is an apocalyptic number.

385931 is a deficient number, since it is larger than the sum of its proper divisors (89173).

385931 is a wasteful number, since it uses less digits than its factorization.

385931 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 4261.

The product of its digits is 3240, while the sum is 29.

The square root of 385931 is about 621.2334504838. The cubic root of 385931 is about 72.8064554715.

The spelling of 385931 in words is "three hundred eighty-five thousand, nine hundred thirty-one".