522490986 has 80 divisors (see below), whose sum is σ = 1222976040. Its totient is φ = 166561920.

The previous prime is 522490919. The next prime is 522490993. The reversal of 522490986 is 689094225.

522490986 is a `hidden beast` number, since 522 + 49 + 0 + 9 + 86 = 666.

It can be written as a sum of positive squares in 4 ways, for example, as 290873025 + 231617961 = 17055^2 + 15219^2 .

It is an unprimeable number.

It is a polite number, since it can be written in 39 ways as a sum of consecutive naturals, for example, 364920 + ... + 366348.

Almost surely, 2^522490986 is an apocalyptic number.

It is a practical number, because each smaller number is the sum of distinct divisors of 522490986, and also a Zumkeller number, because its divisors can be partitioned in two sets with the same sum (611488020).

522490986 is an abundant number, since it is smaller than the sum of its proper divisors (700485054).

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

522490986 is a wasteful number, since it uses less digits than its factorization.

522490986 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 1541 (or 1532 counting only the distinct ones).

The product of its (nonzero) digits is 311040, while the sum is 45.

The square root of 522490986 is about 22858.0617288518. The cubic root of 522490986 is about 805.4271544457.

The spelling of 522490986 in words is "five hundred twenty-two million, four hundred ninety thousand, nine hundred eighty-six".