609805992 has 64 divisors (see below), whose sum is σ = 1593999360. Its totient is φ = 194040000.

The previous prime is 609805979. The next prime is 609806023. The reversal of 609805992 is 299508906.

It is an unprimeable number.

It is a pernicious number, because its binary representation contains a prime number (13) of ones.

It is a polite number, since it can be written in 15 ways as a sum of consecutive naturals, for example, 413817 + ... + 415287.

It is an arithmetic number, because the mean of its divisors is an integer number (24906240).

Almost surely, 2^609805992 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 609805992, and also a Zumkeller number, because its divisors can be partitioned in two sets with the same sum (796999680).

609805992 is an abundant number, since it is smaller than the sum of its proper divisors (984193368).

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

609805992 is a wasteful number, since it uses less digits than its factorization.

609805992 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 2254 (or 2250 counting only the distinct ones).

The product of its (nonzero) digits is 349920, while the sum is 48.

The square root of 609805992 is about 24694.2501809632. The cubic root of 609805992 is about 848.0026885224.

The spelling of 609805992 in words is "six hundred nine million, eight hundred five thousand, nine hundred ninety-two".