520045000 has 40 divisors (see below), whose sum is σ = 1218477150. Its totient is φ = 208016000.

The previous prime is 520044971. The next prime is 520045021. The reversal of 520045000 is 540025.

It is a happy number.

It can be written as a sum of positive squares in 5 ways, for example, as 14424804 + 505620196 = 3798^2 + 22486^2 .

It is a tau number, because it is divible by the number of its divisors (40).

It is an unprimeable number.

It is a pernicious number, because its binary representation contains a prime number (17) of ones.

It is a polite number, since it can be written in 9 ways as a sum of consecutive naturals, for example, 47005 + ... + 57004.

Almost surely, 2^520045000 is an apocalyptic number.

520045000 is a gapful number since it is divisible by the number (50) formed by its first and last digit.

It is an amenable number.

520045000 is an abundant number, since it is smaller than the sum of its proper divisors (698432150).

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

520045000 is a wasteful number, since it uses less digits than its factorization.

520045000 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 104035 (or 104016 counting only the distinct ones).

The product of its (nonzero) digits is 200, while the sum is 16.

The square root of 520045000 is about 22804.4951709087. The cubic root of 520045000 is about 804.1683475435.

Adding to 520045000 its reverse (540025), we get a palindrome (520585025).

The spelling of 520045000 in words is "five hundred twenty million, forty-five thousand".