383820 has 24 divisors (see below), whose sum is σ = 1074864. Its totient is φ = 102336.

The previous prime is 383813. The next prime is 383821. The reversal of 383820 is 28383.

383820 is nontrivially palindromic in base 9.

It is an inconsummate number, since it does not exist a number n which divided by its sum of digits gives 383820.

It is not an unprimeable number, because it can be changed into a prime (383821) by changing a digit.

383820 is an untouchable number, because it is not equal to the sum of proper divisors of any number.

It is a pernicious number, because its binary representation contains a prime number (11) of ones.

It is a polite number, since it can be written in 7 ways as a sum of consecutive naturals, for example, 3139 + ... + 3258.

It is an arithmetic number, because the mean of its divisors is an integer number (44786).

2³⁸³⁸²⁰ is an apocalyptic number.

383820 is a gapful number since it is divisible by the number (30) formed by its first and last digit.

It is an amenable number.

383820 is an abundant number, since it is smaller than the sum of its proper divisors (691044).

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

383820 is a wasteful number, since it uses less digits than its factorization.

383820 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 6409 (or 6407 counting only the distinct ones).

The product of its (nonzero) digits is 1152, while the sum is 24.

The square root of 383820 is about 619.5320814938. The cubic root of 383820 is about 72.6734649346.

The spelling of 383820 in words is "three hundred eighty-three thousand, eight hundred twenty".