520291968 has 128 divisors (see below), whose sum is σ = 1618323840. Its totient is φ = 144998400.

The previous prime is 520291963. The next prime is 520291979. The reversal of 520291968 is 869192025.

It is a tau number, because it is divible by the number of its divisors (128).

It is a Harshad number since it is a multiple of its sum of digits (42).

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (520291963) 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, 107848 + ... + 112568.

It is an arithmetic number, because the mean of its divisors is an integer number (12643155).

Almost surely, 2^520291968 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 520291968, and also a Zumkeller number, because its divisors can be partitioned in two sets with the same sum (809161920).

520291968 is an abundant number, since it is smaller than the sum of its proper divisors (1098031872).

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

520291968 is a wasteful number, since it uses less digits than its factorization.

520291968 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 4786 (or 4774 counting only the distinct ones).

The product of its (nonzero) digits is 77760, while the sum is 42.

The square root of 520291968 is about 22809.9094255107. The cubic root of 520291968 is about 804.2956265404.

The spelling of 520291968 in words is "five hundred twenty million, two hundred ninety-one thousand, nine hundred sixty-eight".