384557 has 4 divisors (see below), whose sum is σ = 407196. Its totient is φ = 361920.

The previous prime is 384547. The next prime is 384577. The reversal of 384557 is 755483.

It is a happy number.

It is a semiprime because it is the product of two primes.

It can be written as a sum of positive squares in 2 ways, for example, as 346921 + 37636 = 589^2 + 194^2 .

It is a cyclic number.

It is not a de Polignac number, because 384557 - 2⁸ = 384301 is a prime.

It is a Duffinian number.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (384547) by changing a digit.

It is a polite number, since it can be written in 3 ways as a sum of consecutive naturals, for example, 11294 + ... + 11327.

It is an arithmetic number, because the mean of its divisors is an integer number (101799).

2³⁸⁴⁵⁵⁷ is an apocalyptic number.

It is an amenable number.

384557 is a deficient number, since it is larger than the sum of its proper divisors (22639).

384557 is a wasteful number, since it uses less digits than its factorization.

384557 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 22638.

The product of its digits is 16800, while the sum is 32.

The square root of 384557 is about 620.1265999778. The cubic root of 384557 is about 72.7199503518.

It can be divided in two parts, 38 and 4557, that multiplied together give a triangular number (173166 = T₅₈₈).

The spelling of 384557 in words is "three hundred eighty-four thousand, five hundred fifty-seven".