520443240 has 32 divisors (see below), whose sum is σ = 1561330080. Its totient is φ = 138784832.

The previous prime is 520443223. The next prime is 520443257. The reversal of 520443240 is 42344025.

It is an interprime number because it is at equal distance from previous prime (520443223) and next prime (520443257).

It is a super-2 number, since 2×520443240² = 541722332123395200, which contains 22 as substring.

It is a Harshad number since it is a multiple of its sum of digits (24).

It is a self number, because there is not a number n which added to its sum of digits gives 520443240.

It is an unprimeable number.

It is a polite number, since it can be written in 7 ways as a sum of consecutive naturals, for example, 2168394 + ... + 2168633.

It is an arithmetic number, because the mean of its divisors is an integer number (48791565).

Almost surely, 2^520443240 is an apocalyptic number.

It is an amenable number.

520443240 is an abundant number, since it is smaller than the sum of its proper divisors (1040886840).

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

520443240 is a wasteful number, since it uses less digits than its factorization.

520443240 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 4337041 (or 4337037 counting only the distinct ones).

The product of its (nonzero) digits is 3840, while the sum is 24.

The square root of 520443240 is about 22813.2251117636. The cubic root of 520443240 is about 804.3735671495.

Adding to 520443240 its reverse (42344025), we get a palindrome (562787265).

The spelling of 520443240 in words is "five hundred twenty million, four hundred forty-three thousand, two hundred forty".