• 500 can be written using four 4's:

500 has 12 divisors (see below), whose sum is σ = 1092. Its totient is φ = 200.

The previous prime is 499. The next prime is 503. The reversal of 500 is 5.

It is a powerful number, because all its prime factors have an exponent greater than 1 and also an Achilles number because it is not a perfect power.

500 is digitally balanced in base 3, because in such base it contains all the possibile digits an equal number of times.

It can be written as a sum of positive squares in 2 ways, for example, as 16 + 484 = 4^2 + 22^2 .

It is a Harshad number since it is a multiple of its sum of digits (5).

It is a super Niven number, because it is divisible the sum of any subset of its (nonzero) digits.

500 is an undulating number in base 7.

It is a plaindrome in base 12, base 14 and base 15.

It is a nialpdrome in base 5, base 8 and base 10.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (503) 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, 98 + ... + 102.

It is an arithmetic number, because the mean of its divisors is an integer number (91).

500 is a gapful number since it is divisible by the number (50) formed by its first and last digit.

It is an amenable number.

It is a practical number, because each smaller number is the sum of distinct divisors of 500, and also a Zumkeller number, because its divisors can be partitioned in two sets with the same sum (546).

500 is an abundant number, since it is smaller than the sum of its proper divisors (592).

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

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

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

The sum of its prime factors is 19 (or 7 counting only the distinct ones).

The product of its (nonzero) digits is 5, while the sum is 5.

The square root of 500 is about 22.3606797750. The cubic root of 500 is about 7.9370052598.

The spelling of 500 in words is "five hundred", and thus it is an aban number and an oban number.

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