385664873 has 18 divisors (see below), whose sum is σ = 449887662. Its totient is φ = 329218560.

The previous prime is 385664863. The next prime is 385664879. The reversal of 385664873 is 378466583.

It can be written as a sum of positive squares in 3 ways, for example, as 3579664 + 382085209 = 1892^2 + 19547^2 .

It is not a de Polignac number, because 385664873 - 2⁶ = 385664809 is a prime.

It is a super-2 number, since 2×385664873² = 297474788532212258, which contains 22 as substring.

It is a Duffinian number.

It is not an unprimeable number, because it can be changed into a prime (385664879) by changing a digit.

It is a polite number, since it can be written in 17 ways as a sum of consecutive naturals, for example, 890465 + ... + 890897.

It is an arithmetic number, because the mean of its divisors is an integer number (24993759).

Almost surely, 2^385664873 is an apocalyptic number.

It is an amenable number.

385664873 is a deficient number, since it is larger than the sum of its proper divisors (64222789).

385664873 is an equidigital number, since it uses as much as digits as its factorization.

385664873 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 905 (or 461 counting only the distinct ones).

The product of its digits is 2903040, while the sum is 50.

The square root of 385664873 is about 19638.3520948169. The cubic root of 385664873 is about 727.8971653895.

The spelling of 385664873 in words is "three hundred eighty-five million, six hundred sixty-four thousand, eight hundred seventy-three".