858958992 has 100 divisors (see below), whose sum is σ = 2616997680. Its totient is φ = 271242432.

The previous prime is 858958957. The next prime is 858958999. The reversal of 858958992 is 299859858.

It is not an unprimeable number, because it can be changed into a prime (858958999) by changing a digit.

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 19 ways as a sum of consecutive naturals, for example, 7183 + ... + 42065.

Almost surely, 2^858958992 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 858958992, and also a Zumkeller number, because its divisors can be partitioned in two sets with the same sum (1308498840).

858958992 is an abundant number, since it is smaller than the sum of its proper divisors (1758038688).

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

858958992 is a wasteful number, since it uses less digits than its factorization.

858958992 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 34922 (or 34907 counting only the distinct ones).

The product of its digits is 18662400, while the sum is 63.

The square root of 858958992 is about 29308.0021837040. The cubic root of 858958992 is about 950.5846786814.

The spelling of 858958992 in words is "eight hundred fifty-eight million, nine hundred fifty-eight thousand, nine hundred ninety-two".