385715669 has 8 divisors (see below), whose sum is σ = 412021080. Its totient is φ = 359812096.

The previous prime is 385715663. The next prime is 385715677. The reversal of 385715669 is 966517583.

It is a happy number.

It can be written as a sum of positive squares in 4 ways, for example, as 30393169 + 355322500 = 5513^2 + 18850^2 .

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 385715669 - 2⁴ = 385715653 is a prime.

It is a super-2 number, since 2×385715669² = 297553154624235122, 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 (385715663) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (19) of ones.

It is a polite number, since it can be written in 7 ways as a sum of consecutive naturals, for example, 98474 + ... + 102315.

It is an arithmetic number, because the mean of its divisors is an integer number (51502635).

Almost surely, 2^385715669 is an apocalyptic number.

It is an amenable number.

385715669 is a deficient number, since it is larger than the sum of its proper divisors (26305411).

385715669 is a wasteful number, since it uses less digits than its factorization.

385715669 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 200919.

The product of its digits is 1360800, while the sum is 50.

The square root of 385715669 is about 19639.6453379383. The cubic root of 385715669 is about 727.9291211485.

The spelling of 385715669 in words is "three hundred eighty-five million, seven hundred fifteen thousand, six hundred sixty-nine".