1029985566 has 8 divisors (see below), whose sum is σ = 2059971144. Its totient is φ = 343328520.

The previous prime is 1029985553. The next prime is 1029985601. The reversal of 1029985566 is 6655899201.

It is a sphenic number, since it is the product of 3 distinct primes.

1029985566 is an admirable number.

It is a congruent number.

It is an unprimeable number.

It is a polite number, since it can be written in 3 ways as a sum of consecutive naturals, for example, 85832125 + ... + 85832136.

It is an arithmetic number, because the mean of its divisors is an integer number (257496393).

Almost surely, 2^1029985566 is an apocalyptic number.

1029985566 is a primitive abundant number, since it is smaller than the sum of its proper divisors, none of which is abundant.

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

1029985566 is a wasteful number, since it uses less digits than its factorization.

1029985566 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 171664266.

The product of its (nonzero) digits is 1166400, while the sum is 51.

The square root of 1029985566 is about 32093.3881975712. The cubic root of 1029985566 is about 1009.8969165780.

The spelling of 1029985566 in words is "one billion, twenty-nine million, nine hundred eighty-five thousand, five hundred sixty-six".