505384 has 16 divisors (see below), whose sum is σ = 1033920. Its totient is φ = 229680.

The previous prime is 505369. The next prime is 505399. The reversal of 505384 is 483505.

It is a happy number.

It is an interprime number because it is at equal distance from previous prime (505369) and next prime (505399).

It is an unprimeable number.

505384 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, 2784 + ... + 2959.

It is an arithmetic number, because the mean of its divisors is an integer number (64620).

2⁵⁰⁵³⁸⁴ is an apocalyptic number.

It is an amenable number.

505384 is an abundant number, since it is smaller than the sum of its proper divisors (528536).

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

505384 is a wasteful number, since it uses less digits than its factorization.

505384 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 5760 (or 5756 counting only the distinct ones).

The product of its (nonzero) digits is 2400, while the sum is 25.

The square root of 505384 is about 710.9036502931. The cubic root of 505384 is about 79.6539216981.

Adding to 505384 its reverse (483505), we get a palindrome (988889).

The spelling of 505384 in words is "five hundred five thousand, three hundred eighty-four".