981730566 has 24 divisors (see below), whose sum is σ = 2127709584. Its totient is φ = 327147120.

The previous prime is 981730511. The next prime is 981730567. The reversal of 981730566 is 665037189.

It is a happy number.

981730566 is a `hidden beast` number, since 9 + 81 + 7 + 3 + 0 + 566 = 666.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (981730567) by changing a digit.

It is a polite number, since it can be written in 11 ways as a sum of consecutive naturals, for example, 82080 + ... + 93276.

It is an arithmetic number, because the mean of its divisors is an integer number (88654566).

Almost surely, 2^981730566 is an apocalyptic number.

981730566 is an abundant number, since it is smaller than the sum of its proper divisors (1145979018).

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

981730566 is a wasteful number, since it uses less digits than its factorization.

981730566 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 16076 (or 16073 counting only the distinct ones).

The product of its (nonzero) digits is 272160, while the sum is 45.

The square root of 981730566 is about 31332.5799448434. The cubic root of 981730566 is about 993.8727218085.

The spelling of 981730566 in words is "nine hundred eighty-one million, seven hundred thirty thousand, five hundred sixty-six".