385820 has 24 divisors (see below), whose sum is σ = 822528. Its totient is φ = 152000.

The previous prime is 385817. The next prime is 385831. The reversal of 385820 is 28583.

It is a self number, because there is not a number n which added to its sum of digits gives 385820.

It is a congruent number.

It is an unprimeable number.

It is a polite number, since it can be written in 7 ways as a sum of consecutive naturals, for example, 1925 + ... + 2115.

It is an arithmetic number, because the mean of its divisors is an integer number (34272).

2³⁸⁵⁸²⁰ is an apocalyptic number.

It is an amenable number.

385820 is an abundant number, since it is smaller than the sum of its proper divisors (436708).

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

385820 is a wasteful number, since it uses less digits than its factorization.

385820 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 301 (or 299 counting only the distinct ones).

The product of its (nonzero) digits is 1920, while the sum is 26.

The square root of 385820 is about 621.1441056631. The cubic root of 385820 is about 72.7994746973.

The spelling of 385820 in words is "three hundred eighty-five thousand, eight hundred twenty".