520007040 has 320 divisors, whose sum is σ = 2123811360. Its totient is φ = 118775808.

The previous prime is 520007039. The next prime is 520007057. The reversal of 520007040 is 40700025.

It is a happy number.

It is a tau number, because it is divible by the number of its divisors (320).

It is a Harshad number since it is a multiple of its sum of digits (18).

It is a congruent number.

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 39 ways as a sum of consecutive naturals, for example, 362164 + ... + 363596.

Almost surely, 2^520007040 is an apocalyptic number.

It is an amenable number.

It is a practical number, because each smaller number is the sum of distinct divisors of 520007040, and also a Zumkeller number, because its divisors can be partitioned in two sets with the same sum (1061905680).

520007040 is an abundant number, since it is smaller than the sum of its proper divisors (1603804320).

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

520007040 is a wasteful number, since it uses less digits than its factorization.

520007040 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 1471 (or 1450 counting only the distinct ones).

The product of its (nonzero) digits is 280, while the sum is 18.

The square root of 520007040 is about 22803.6628636717. The cubic root of 520007040 is about 804.1487806642.

Adding to 520007040 its reverse (40700025), we get a palindrome (560707065).

The spelling of 520007040 in words is "five hundred twenty million, seven thousand, forty".