385399799808 has 240 divisors, whose sum is σ = 1052591379840. Its totient is φ = 125382426624.

The previous prime is 385399799779. The next prime is 385399799821. The reversal of 385399799808 is 808997993583.

It is a happy number.

It is a super-5 number, since 5×385399799808⁵ (a number of 59 digits) contains 55555 as substring.

It is an unprimeable number.

It is a polite number, since it can be written in 15 ways as a sum of consecutive naturals, for example, 877903653 + ... + 877904091.

It is an arithmetic number, because the mean of its divisors is an integer number (4385797416).

Almost surely, 2^385399799808 is an apocalyptic number.

It is an amenable number.

It is a practical number, because each smaller number is the sum of distinct divisors of 385399799808, and also a Zumkeller number, because its divisors can be partitioned in two sets with the same sum (526295689920).

385399799808 is an abundant number, since it is smaller than the sum of its proper divisors (667191580032).

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

385399799808 is an equidigital number, since it uses as much as digits as its factorization.

385399799808 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 860 (or 834 counting only the distinct ones).

The product of its (nonzero) digits is 1058158080, while the sum is 78.

The spelling of 385399799808 in words is "three hundred eighty-five billion, three hundred ninety-nine million, seven hundred ninety-nine thousand, eight hundred eight".