385668842 has 16 divisors (see below), whose sum is σ = 623371560. Its totient is φ = 177895872.

The previous prime is 385668809. The next prime is 385668869. The reversal of 385668842 is 248866583.

It can be written as a sum of positive squares in 4 ways, for example, as 121638841 + 264030001 = 11029^2 + 16249^2 .

It is an unprimeable number.

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, 56384 + ... + 62852.

Almost surely, 2^385668842 is an apocalyptic number.

385668842 is a deficient number, since it is larger than the sum of its proper divisors (237702718).

385668842 is a wasteful number, since it uses less digits than its factorization.

385668842 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 8777.

The product of its digits is 2211840, while the sum is 50.

The square root of 385668842 is about 19638.4531468240. The cubic root of 385668842 is about 727.8996623881.

The spelling of 385668842 in words is "three hundred eighty-five million, six hundred sixty-eight thousand, eight hundred forty-two".