520440440 has 32 divisors (see below), whose sum is σ = 1261068480. Its totient is φ = 192162432.

The previous prime is 520440439. The next prime is 520440449. The reversal of 520440440 is 44044025.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (520440449) by changing a digit.

It is a polite number, since it can be written in 7 ways as a sum of consecutive naturals, for example, 499904 + ... + 500943.

It is an arithmetic number, because the mean of its divisors is an integer number (39408390).

Almost surely, 2^520440440 is an apocalyptic number.

It is an amenable number.

520440440 is an abundant number, since it is smaller than the sum of its proper divisors (740628040).

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

520440440 is a wasteful number, since it uses less digits than its factorization.

520440440 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 1000871 (or 1000867 counting only the distinct ones).

The product of its (nonzero) digits is 2560, while the sum is 23.

The square root of 520440440 is about 22813.1637437686. The cubic root of 520440440 is about 804.3721246290.

Adding to 520440440 its reverse (44044025), we get a palindrome (564484465).

The spelling of 520440440 in words is "five hundred twenty million, four hundred forty thousand, four hundred forty".