520402040 has 64 divisors (see below), whose sum is σ = 1208628000. Its totient is φ = 201512448.

The previous prime is 520402033. The next prime is 520402049. The reversal of 520402040 is 40204025.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (520402049) by changing a digit.

It is a polite number, since it can be written in 15 ways as a sum of consecutive naturals, for example, 335186 + ... + 336734.

Almost surely, 2^520402040 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 520402040, and also a Zumkeller number, because its divisors can be partitioned in two sets with the same sum (604314000).

520402040 is an abundant number, since it is smaller than the sum of its proper divisors (688225960).

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

520402040 is a wasteful number, since it uses less digits than its factorization.

520402040 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 1824 (or 1820 counting only the distinct ones).

The product of its (nonzero) digits is 320, while the sum is 17.

The square root of 520402040 is about 22812.3221088954. The cubic root of 520402040 is about 804.3523409696.

Adding to 520402040 its reverse (40204025), we get a palindrome (560606065).

The spelling of 520402040 in words is "five hundred twenty million, four hundred two thousand, forty".