500000 has 42 divisors (see below), whose sum is σ = 1230453. Its totient is φ = 200000.

The previous prime is 499979. The next prime is 500009. The reversal of 500000 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 4 ways, for example, as 85264 + 414736 = 292^2 + 644^2 .

It is an ABA number since it can be written as A⋅B^{A}, here for A=5, B=10.

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 Duffinian number.

It is a plaindrome in base 13.

It is a nialpdrome in base 10.

It is not an unprimeable number, because it can be changed into a prime (500009) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (7) of ones.

It is a polite number, since it can be written in 6 ways as a sum of consecutive naturals, for example, 99998 + ... + 100002.

2^{500000} is an apocalyptic number.

500000 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 500000

500000 is an abundant number, since it is smaller than the sum of its proper divisors (730453).

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

500000 is an frugal number, since it uses more digits than its factorization.

500000 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 40 (or 7 counting only the distinct ones).

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

The square root of 500000 is about 707.1067811865. The cubic root of 500000 is about 79.3700525984.

The spelling of 500000 in words is "five hundred thousand".

Divisors: 1 2 4 5 8 10 16 20 25 32 40 50 80 100 125 160 200 250 400 500 625 800 1000 1250 2000 2500 3125 4000 5000 6250 10000 12500 15625 20000 25000 31250 50000 62500 100000 125000 250000 500000

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