521130768 has 80 divisors (see below), whose sum is σ = 1389553920. Its totient is φ = 168210432.

The previous prime is 521130761. The next prime is 521130769. The reversal of 521130768 is 867031125.

It is not an unprimeable number, because it can be changed into a prime (521130761) 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, 199680 + ... + 202272.

It is an arithmetic number, because the mean of its divisors is an integer number (17369424).

Almost surely, 2^521130768 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 521130768, and also a Zumkeller number, because its divisors can be partitioned in two sets with the same sum (694776960).

521130768 is an abundant number, since it is smaller than the sum of its proper divisors (868423152).

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

521130768 is a wasteful number, since it uses less digits than its factorization.

521130768 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 2736 (or 2730 counting only the distinct ones).

The product of its (nonzero) digits is 10080, while the sum is 33.

The square root of 521130768 is about 22828.2887663530. The cubic root of 521130768 is about 804.7276153663.

The spelling of 521130768 in words is "five hundred twenty-one million, one hundred thirty thousand, seven hundred sixty-eight".