385661868 has 24 divisors (see below), whose sum is σ = 901135872. Its totient is φ = 128374224.

The previous prime is 385661839. The next prime is 385661873. The reversal of 385661868 is 868166583.

It is a self number, because there is not a number n which added to its sum of digits gives 385661868.

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, 13380 + ... + 30827.

It is an arithmetic number, because the mean of its divisors is an integer number (37547328).

Almost surely, 2^385661868 is an apocalyptic number.

It is an amenable number.

385661868 is an abundant number, since it is smaller than the sum of its proper divisors (515474004).

It is a pseudoperfect number, because it is the sum of a subset of its proper divisors.

385661868 is a wasteful number, since it uses less digits than its factorization.

385661868 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 44941 (or 44939 counting only the distinct ones).

The product of its digits is 1658880, while the sum is 51.

The square root of 385661868 is about 19638.2755862117. The cubic root of 385661868 is about 727.8952748564.

The spelling of 385661868 in words is "three hundred eighty-five million, six hundred sixty-one thousand, eight hundred sixty-eight".