520398240 has 192 divisors, whose sum is σ = 1735437312. Its totient is φ = 130867200.

The previous prime is 520398233. The next prime is 520398247. The reversal of 520398240 is 42893025.

It is a happy number.

It is an interprime number because it is at equal distance from previous prime (520398233) and next prime (520398247).

It is not an unprimeable number, because it can be changed into a prime (520398247) by changing a digit.

It is a polite number, since it can be written in 31 ways as a sum of consecutive naturals, for example, 609654 + ... + 610506.

It is an arithmetic number, because the mean of its divisors is an integer number (9038736).

Almost surely, 2^520398240 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 520398240, and also a Zumkeller number, because its divisors can be partitioned in two sets with the same sum (867718656).

520398240 is an abundant number, since it is smaller than the sum of its proper divisors (1215039072).

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

520398240 is a wasteful number, since it uses less digits than its factorization.

520398240 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 943 (or 935 counting only the distinct ones).

The product of its (nonzero) digits is 17280, while the sum is 33.

The square root of 520398240 is about 22812.2388204227. The cubic root of 520398240 is about 804.3503831587.

The spelling of 520398240 in words is "five hundred twenty million, three hundred ninety-eight thousand, two hundred forty".