385188330 has 64 divisors (see below), whose sum is σ = 1004544000. Its totient is φ = 94167360.

The previous prime is 385188319. The next prime is 385188373. The reversal of 385188330 is 33881583.

It is a Curzon number.

It is an unprimeable number.

It is a polite number, since it can be written in 31 ways as a sum of consecutive naturals, for example, 6771 + ... + 28569.

It is an arithmetic number, because the mean of its divisors is an integer number (15696000).

Almost surely, 2^385188330 is an apocalyptic number.

385188330 is a gapful number since it is divisible by the number (30) formed by its first and last digit.

It is a practical number, because each smaller number is the sum of distinct divisors of 385188330, and also a Zumkeller number, because its divisors can be partitioned in two sets with the same sum (502272000).

385188330 is an abundant number, since it is smaller than the sum of its proper divisors (619355670).

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

385188330 is a wasteful number, since it uses less digits than its factorization.

385188330 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 21859.

The product of its (nonzero) digits is 69120, while the sum is 39.

The square root of 385188330 is about 19626.2153763786. The cubic root of 385188330 is about 727.5972355005.

The spelling of 385188330 in words is "three hundred eighty-five million, one hundred eighty-eight thousand, three hundred thirty".