2081287000 has 128 divisors (see below), whose sum is σ = 5387840640. Its totient is φ = 747532800.

The previous prime is 2081286973. The next prime is 2081287003. The reversal of 2081287000 is 7821802.

It is a self number, because there is not a number n which added to its sum of digits gives 2081287000.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (2081287003) 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 31 ways as a sum of consecutive naturals, for example, 478837 + ... + 483163.

It is an arithmetic number, because the mean of its divisors is an integer number (42092505).

Almost surely, 2^2081287000 is an apocalyptic number.

2081287000 is a gapful number since it is divisible by the number (20) formed by its first and last digit.

It is an amenable number.

It is a practical number, because each smaller number is the sum of distinct divisors of 2081287000, and also a Zumkeller number, because its divisors can be partitioned in two sets with the same sum (2693920320).

2081287000 is an abundant number, since it is smaller than the sum of its proper divisors (3306553640).

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

2081287000 is a wasteful number, since it uses less digits than its factorization.

2081287000 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 4398 (or 4384 counting only the distinct ones).

The product of its (nonzero) digits is 1792, while the sum is 28.

The square root of 2081287000 is about 45621.1244929364. The cubic root of 2081287000 is about 1276.7640837918.

The spelling of 2081287000 in words is "two billion, eighty-one million, two hundred eighty-seven thousand".