2810221989 has 8 divisors (see below), whose sum is σ = 3762641280. Its totient is φ = 1865642016.

The previous prime is 2810221987. The next prime is 2810222011. The reversal of 2810221989 is 9891220182.

It is a sphenic number, since it is the product of 3 distinct primes.

It is not a de Polignac number, because 2810221989 - 2¹ = 2810221987 is a prime.

It is a super-2 number, since 2×2810221989² = 15794695254918232242, which contains 22 as substring.

It is a self number, because there is not a number n which added to its sum of digits gives 2810221989.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (2810221987) by changing a digit.

It is a polite number, since it can be written in 7 ways as a sum of consecutive naturals, for example, 1958992 + ... + 1960425.

It is an arithmetic number, because the mean of its divisors is an integer number (470330160).

Almost surely, 2^2810221989 is an apocalyptic number.

It is an amenable number.

2810221989 is a deficient number, since it is larger than the sum of its proper divisors (952419291).

2810221989 is a wasteful number, since it uses less digits than its factorization.

2810221989 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 3919659.

The product of its (nonzero) digits is 41472, while the sum is 42.

The square root of 2810221989 is about 53011.5269446184. The cubic root of 2810221989 is about 1411.1728398632.

The spelling of 2810221989 in words is "two billion, eight hundred ten million, two hundred twenty-one thousand, nine hundred eighty-nine".