506404 has 6 divisors (see below), whose sum is σ = 886214. Its totient is φ = 253200.

The previous prime is 506393. The next prime is 506417. The reversal of 506404 is 404605.

It can be written as a sum of positive squares in only one way, i.e., 504100 + 2304 = 710^2 + 48^2 .

It is a super-2 number, since 2×506404² = 512890022432, which contains 22 as substring.

It is an unprimeable number.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 63297 + ... + 63304.

2⁵⁰⁶⁴⁰⁴ is an apocalyptic number.

It is an amenable number.

506404 is a deficient number, since it is larger than the sum of its proper divisors (379810).

506404 is a wasteful number, since it uses less digits than its factorization.

506404 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 126605 (or 126603 counting only the distinct ones).

The product of its (nonzero) digits is 480, while the sum is 19.

The square root of 506404 is about 711.6206854779. The cubic root of 506404 is about 79.7074733222.

The spelling of 506404 in words is "five hundred six thousand, four hundred four".