981899000 has 64 divisors (see below), whose sum is σ = 2320194240. Its totient is φ = 388905600.

The previous prime is 981898969. The next prime is 981899011. The reversal of 981899000 is 998189.

It is a congruent number.

It is an unprimeable number.

It is a polite number, since it can be written in 15 ways as a sum of consecutive naturals, for example, 98234 + ... + 107766.

It is an arithmetic number, because the mean of its divisors is an integer number (36253035).

Almost surely, 2^981899000 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 981899000, and also a Zumkeller number, because its divisors can be partitioned in two sets with the same sum (1160097120).

981899000 is an abundant number, since it is smaller than the sum of its proper divisors (1338295240).

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

981899000 is a wasteful number, since it uses less digits than its factorization.

981899000 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 9657 (or 9643 counting only the distinct ones).

The product of its (nonzero) digits is 46656, while the sum is 44.

The square root of 981899000 is about 31335.2676707891. The cubic root of 981899000 is about 993.9295576286.

The spelling of 981899000 in words is "nine hundred eighty-one million, eight hundred ninety-nine thousand".