385618660 has 24 divisors (see below), whose sum is σ = 925485120. Its totient is φ = 132212064.

The previous prime is 385618657. The next prime is 385618687. The reversal of 385618660 is 66816583.

It is an unprimeable number.

It is a polite number, since it can be written in 7 ways as a sum of consecutive naturals, for example, 1377070 + ... + 1377349.

It is an arithmetic number, because the mean of its divisors is an integer number (38561880).

Almost surely, 2^385618660 is an apocalyptic number.

It is an amenable number.

385618660 is an abundant number, since it is smaller than the sum of its proper divisors (539866460).

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

385618660 is a wasteful number, since it uses less digits than its factorization.

385618660 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 2754435 (or 2754433 counting only the distinct ones).

The product of its (nonzero) digits is 207360, while the sum is 43.

The square root of 385618660 is about 19637.1754588077. The cubic root of 385618660 is about 727.8680903577.

The spelling of 385618660 in words is "three hundred eighty-five million, six hundred eighteen thousand, six hundred sixty".