385109839872 has 156 divisors (see below), whose sum is σ = 1113757660704. Its totient is φ = 128213729280.

The previous prime is 385109839861. The next prime is 385109839889. The reversal of 385109839872 is 278938901583.

385109839872 is a `hidden beast` number, since 3 + 8 + 510 + 9 + 8 + 39 + 87 + 2 = 666.

It is a Smith number, since the sum of its digits (63) coincides with the sum of the digits of its prime factors.

It is a congruent number.

It is an unprimeable number.

It is a polite number, since it can be written in 11 ways as a sum of consecutive naturals, for example, 32544997 + ... + 32556827.

It is an arithmetic number, because the mean of its divisors is an integer number (7139472184).

Almost surely, 2^385109839872 is an apocalyptic number.

385109839872 is a gapful number since it is divisible by the number (32) 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 385109839872, and also a Zumkeller number, because its divisors can be partitioned in two sets with the same sum (556878830352).

385109839872 is an abundant number, since it is smaller than the sum of its proper divisors (728647820832).

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

385109839872 is a wasteful number, since it uses less digits than its factorization.

385109839872 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 12744 (or 12719 counting only the distinct ones).

The product of its (nonzero) digits is 26127360, while the sum is 63.

The spelling of 385109839872 in words is "three hundred eighty-five billion, one hundred nine million, eight hundred thirty-nine thousand, eight hundred seventy-two".