384520 has 16 divisors (see below), whose sum is σ = 865260. Its totient is φ = 153792.

The previous prime is 384509. The next prime is 384533. The reversal of 384520 is 25483.

It can be written as a sum of positive squares in 2 ways, for example, as 352836 + 31684 = 594^2 + 178^2 .

It is a junction number, because it is equal to n+sod(n) for n = 384491 and 384500.

It is an unprimeable number.

384520 is an untouchable number, because it is not equal to the sum of proper divisors of any number.

It is a polite number, since it can be written in 3 ways as a sum of consecutive naturals, for example, 4767 + ... + 4846.

2³⁸⁴⁵²⁰ is an apocalyptic number.

It is an amenable number.

384520 is an abundant number, since it is smaller than the sum of its proper divisors (480740).

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

384520 is a wasteful number, since it uses less digits than its factorization.

384520 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 9624 (or 9620 counting only the distinct ones).

The product of its (nonzero) digits is 960, while the sum is 22.

The square root of 384520 is about 620.0967666421. The cubic root of 384520 is about 72.7176180366.

The spelling of 384520 in words is "three hundred eighty-four thousand, five hundred twenty".