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BaseRepresentation
bin1111010000100100000
3221101212112
41322010200
5112000000
614414452
74151504
oct1720440
9841775
10500000
11311726
12201428
13146777
14d0304
159d235
hex7a120

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⋅BA, 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.

2500000 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".