520439040 has 432 divisors, whose sum is σ = 2070653760. Its totient is φ = 122757120.

The previous prime is 520439039. The next prime is 520439057. The reversal of 520439040 is 40934025.

It is a tau number, because it is divible by the number of its divisors (432).

It is a super-2 number, since 2×520439040² = 541713588712243200, which contains 22 as substring.

It is a Harshad number since it is a multiple of its sum of digits (27).

It is a junction number, because it is equal to n+sod(n) for n = 520438995 and 520439013.

It is a congruent number.

It is an unprimeable number.

It is a polite number, since it can be written in 47 ways as a sum of consecutive naturals, for example, 14065902 + ... + 14065938.

It is an arithmetic number, because the mean of its divisors is an integer number (4793180).

Almost surely, 2^520439040 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 520439040, and also a Zumkeller number, because its divisors can be partitioned in two sets with the same sum (1035326880).

520439040 is an abundant number, since it is smaller than the sum of its proper divisors (1550214720).

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

520439040 is a wasteful number, since it uses less digits than its factorization.

520439040 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 115 (or 58 counting only the distinct ones).

The product of its (nonzero) digits is 4320, while the sum is 27.

The square root of 520439040 is about 22813.1330597093. The cubic root of 520439040 is about 804.3714033669.

It can be divided in two parts, 5204 and 39040, that added together give a palindrome (44244).

The spelling of 520439040 in words is "five hundred twenty million, four hundred thirty-nine thousand, forty".