500000000 has 90 divisors (see below), whose sum is σ = 1247558466. Its totient is φ = 200000000.

The previous prime is 499999993. The next prime is 500000003. The reversal of 500000000 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.

It can be written as a sum of positive squares in 5 ways, for example, as 131974144 + 368025856 = 11488^2 + 19184^2 .

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.

It is a nialpdrome in base 10.

It is a self number, because there is not a number n which added to its sum of digits gives 500000000.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (500000003) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (13) of ones.

It is a polite number, since it can be written in 9 ways as a sum of consecutive naturals, for example, 99999998 + ... + 100000002.

Almost surely, 2^500000000 is an apocalyptic number.

500000000 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 500000000, and also a Zumkeller number, because its divisors can be partitioned in two sets with the same sum (623779233).

500000000 is an abundant number, since it is smaller than the sum of its proper divisors (747558466).

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

500000000 is an frugal number, since it uses more digits than its factorization.

500000000 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 61 (or 7 counting only the distinct ones).

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

The square root of 500000000 is about 22360.6797749979. The cubic root of 500000000 is about 793.7005259841.

The spelling of 500000000 in words is "five hundred million", and thus it is an aban number.