2871890 has 24 divisors (see below), whose sum is σ = 6014412. Its totient is φ = 984480.

The previous prime is 2871881. The next prime is 2871901. The reversal of 2871890 is 981782.

It is a happy number.

2871890 is digitally balanced in base 2, because in such base it contains all the possibile digits an equal number of times.

It can be written as a sum of positive squares in 2 ways, for example, as 2845969 + 25921 = 1687^2 + 161^2 .

It is a Harshad number since it is a multiple of its sum of digits (35).

It is a self number, because there is not a number n which added to its sum of digits gives 2871890.

It is an unprimeable number.

It is a pernicious number, because its binary representation contains a prime number (11) of ones.

It is a polite number, since it can be written in 11 ways as a sum of consecutive naturals, for example, 2441 + ... + 3420.

2^2871890 is an apocalyptic number.

2871890 is an abundant number, since it is smaller than the sum of its proper divisors (3142522).

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

2871890 is a wasteful number, since it uses less digits than its factorization.

2871890 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 5882 (or 5875 counting only the distinct ones).

The product of its (nonzero) digits is 8064, while the sum is 35.

The square root of 2871890 is about 1694.6651586670. The cubic root of 2871890 is about 142.1420584572.

The spelling of 2871890 in words is "two million, eight hundred seventy-one thousand, eight hundred ninety".