504390 has 64 divisors (see below), whose sum is σ = 1368576. Its totient is φ = 118272.

The previous prime is 504389. The next prime is 504403. The reversal of 504390 is 93405.

It is a Curzon number.

It is a congruent number.

It is an unprimeable number.

It is a polite number, since it can be written in 31 ways as a sum of consecutive naturals, for example, 11709 + ... + 11751.

It is an arithmetic number, because the mean of its divisors is an integer number (21384).

2⁵⁰⁴³⁹⁰ is an apocalyptic number.

It is a practical number, because each smaller number is the sum of distinct divisors of 504390, and also a Zumkeller number, because its divisors can be partitioned in two sets with the same sum (684288).

504390 is an abundant number, since it is smaller than the sum of its proper divisors (864186).

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

504390 is a wasteful number, since it uses less digits than its factorization.

504390 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 93.

The product of its (nonzero) digits is 540, while the sum is 21.

The square root of 504390 is about 710.2041959887. The cubic root of 504390 is about 79.6016657480.

Adding to 504390 its reverse (93405), we get a palindrome (597795).

The spelling of 504390 in words is "five hundred four thousand, three hundred ninety".