385831813 has 8 divisors (see below), whose sum is σ = 413700480. Its totient is φ = 358537920.

The previous prime is 385831807. The next prime is 385831829. The reversal of 385831813 is 318138583.

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 385831813 - 2²⁵ = 352277381 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 (385831843) 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, 142303 + ... + 144988.

It is an arithmetic number, because the mean of its divisors is an integer number (51712560).

Almost surely, 2^385831813 is an apocalyptic number.

It is an amenable number.

385831813 is a deficient number, since it is larger than the sum of its proper divisors (27868667).

385831813 is a wasteful number, since it uses less digits than its factorization.

385831813 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 287387.

The product of its digits is 69120, while the sum is 40.

The square root of 385831813 is about 19642.6019915896. The cubic root of 385831813 is about 728.0021767888.

The spelling of 385831813 in words is "three hundred eighty-five million, eight hundred thirty-one thousand, eight hundred thirteen".