520919040 has 192 divisors, whose sum is σ = 1723438080. Its totient is φ = 134184960.

The previous prime is 520919027. The next prime is 520919051. The reversal of 520919040 is 40919025.

It is a happy number.

It is a tau number, because it is divible by the number of its divisors (192).

It is a hoax number, since the sum of its digits (30) coincides with the sum of the digits of its distinct prime factors.

It is a Harshad number since it is a multiple of its sum of digits (30).

It is a junction number, because it is equal to n+sod(n) for n = 520918989 and 520919007.

It is a congruent number.

It is an unprimeable number.

It is a polite number, since it can be written in 15 ways as a sum of consecutive naturals, for example, 952047 + ... + 952593.

It is an arithmetic number, because the mean of its divisors is an integer number (8976240).

Almost surely, 2^520919040 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 520919040, and also a Zumkeller number, because its divisors can be partitioned in two sets with the same sum (861719040).

520919040 is an abundant number, since it is smaller than the sum of its proper divisors (1202519040).

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

520919040 is a wasteful number, since it uses less digits than its factorization.

520919040 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 608 (or 588 counting only the distinct ones).

The product of its (nonzero) digits is 3240, while the sum is 30.

The square root of 520919040 is about 22823.6508911261. The cubic root of 520919040 is about 804.6186174851.

The spelling of 520919040 in words is "five hundred twenty million, nine hundred nineteen thousand, forty".