1000985900 has 36 divisors (see below), whose sum is σ = 2184313320. Its totient is φ = 398150400.

The previous prime is 1000985897. The next prime is 1000985957. The reversal of 1000985900 is 95890001.

It is an unprimeable number.

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 11 ways as a sum of consecutive naturals, for example, 10061 + ... + 45860.

It is an arithmetic number, because the mean of its divisors is an integer number (60675370).

Almost surely, 2^1000985900 is an apocalyptic number.

1000985900 is a gapful number since it is divisible by the number (10) formed by its first and last digit.

It is an amenable number.

1000985900 is an abundant number, since it is smaller than the sum of its proper divisors (1183327420).

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

1000985900 is a wasteful number, since it uses less digits than its factorization.

1000985900 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 56114 (or 56107 counting only the distinct ones).

The product of its (nonzero) digits is 3240, while the sum is 32.

The square root of 1000985900 is about 31638.3612091398. The cubic root of 1000985900 is about 1000.3285253926.

The spelling of 1000985900 in words is "one billion, nine hundred eighty-five thousand, nine hundred".