385803840 has 224 divisors, whose sum is σ = 1298301696. Its totient is φ = 96870400.

The previous prime is 385803829. The next prime is 385803841. The reversal of 385803840 is 48308583.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (385803841) by changing a digit.

It is a polite number, since it can be written in 31 ways as a sum of consecutive naturals, for example, 2229994 + ... + 2230166.

Almost surely, 2^385803840 is an apocalyptic number.

385803840 is a gapful number since it is divisible by the number (30) formed by its first and last digit.

It is an amenable number.

It is a practical number, because each smaller number is the sum of distinct divisors of 385803840, and also a Zumkeller number, because its divisors can be partitioned in two sets with the same sum (649150848).

385803840 is an abundant number, since it is smaller than the sum of its proper divisors (912497856).

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

385803840 is a wasteful number, since it uses less digits than its factorization.

385803840 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 317 (or 307 counting only the distinct ones).

The product of its (nonzero) digits is 92160, while the sum is 39.

The square root of 385803840 is about 19641.8899294340. The cubic root of 385803840 is about 727.9845828559.

The spelling of 385803840 in words is "three hundred eighty-five million, eight hundred three thousand, eight hundred forty".