385684776820 has 384 divisors, whose sum is σ = 1037848412160. Its totient is φ = 117366796800.

The previous prime is 385684776817. The next prime is 385684776863. The reversal of 385684776820 is 28677486583.

It is a congruent number.

It is an unprimeable number.

It is a polite number, since it can be written in 127 ways as a sum of consecutive naturals, for example, 766768689 + ... + 766769191.

It is an arithmetic number, because the mean of its divisors is an integer number (2702730240).

Almost surely, 2^385684776820 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 385684776820, and also a Zumkeller number, because its divisors can be partitioned in two sets with the same sum (518924206080).

385684776820 is an abundant number, since it is smaller than the sum of its proper divisors (652163635340).

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

385684776820 is a wasteful number, since it uses less digits than its factorization.

385684776820 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 795 (or 793 counting only the distinct ones).

The product of its (nonzero) digits is 108380160, while the sum is 64.

The spelling of 385684776820 in words is "three hundred eighty-five billion, six hundred eighty-four million, seven hundred seventy-six thousand, eight hundred twenty".