899398992 has 80 divisors (see below), whose sum is σ = 2440379520. Its totient is φ = 284883456.

The previous prime is 899398937. The next prime is 899398993. The reversal of 899398992 is 299893998.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (899398993) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (17) of ones.

It is a polite number, since it can be written in 15 ways as a sum of consecutive naturals, for example, 170734 + ... + 175922.

It is an arithmetic number, because the mean of its divisors is an integer number (30504744).

Almost surely, 2^899398992 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 899398992, and also a Zumkeller number, because its divisors can be partitioned in two sets with the same sum (1220189760).

899398992 is an abundant number, since it is smaller than the sum of its proper divisors (1540980528).

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

899398992 is a wasteful number, since it uses less digits than its factorization.

899398992 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 5380 (or 5374 counting only the distinct ones).

The product of its digits is 22674816, while the sum is 66.

The square root of 899398992 is about 29989.9815271700. The cubic root of 899398992 is about 965.2744231031.

The spelling of 899398992 in words is "eight hundred ninety-nine million, three hundred ninety-eight thousand, nine hundred ninety-two".