385340020 has 48 divisors (see below), whose sum is σ = 922734288. Its totient is φ = 133908480.

The previous prime is 385340009. The next prime is 385340047. The reversal of 385340020 is 20043583.

It can be written as a sum of positive squares in 8 ways, for example, as 4153444 + 381186576 = 2038^2 + 19524^2 .

It is a congruent number.

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, 39171 + ... + 48010.

It is an arithmetic number, because the mean of its divisors is an integer number (19223631).

Almost surely, 2^385340020 is an apocalyptic number.

It is an amenable number.

385340020 is an abundant number, since it is smaller than the sum of its proper divisors (537394268).

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

385340020 is a wasteful number, since it uses less digits than its factorization.

385340020 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 87220 (or 87218 counting only the distinct ones).

The product of its (nonzero) digits is 2880, while the sum is 25.

The square root of 385340020 is about 19630.0794700378. The cubic root of 385340020 is about 727.6927340148.

The spelling of 385340020 in words is "three hundred eighty-five million, three hundred forty thousand, twenty".