2873871 has 72 divisors (see below), whose sum is σ = 5809440. Its totient is φ = 1330560.

The previous prime is 2873863. The next prime is 2873879. The reversal of 2873871 is 1783782.

It is an interprime number because it is at equal distance from previous prime (2873863) and next prime (2873879).

It is not a de Polignac number, because 2873871 - 2³ = 2873863 is a prime.

It is an Ulam number.

2873871 is a lucky number.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (2873879) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (13) of ones.

It is a polite number, since it can be written in 71 ways as a sum of consecutive naturals, for example, 99085 + ... + 99113.

2^2873871 is an apocalyptic number.

2873871 is a gapful number since it is divisible by the number (21) formed by its first and last digit.

2873871 is an abundant number, since it is smaller than the sum of its proper divisors (2935569).

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

2873871 is a wasteful number, since it uses less digits than its factorization.

2873871 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 77 (or 63 counting only the distinct ones).

The product of its digits is 18816, while the sum is 36.

The square root of 2873871 is about 1695.2495391535. The cubic root of 2873871 is about 142.1747336523.

The spelling of 2873871 in words is "two million, eight hundred seventy-three thousand, eight hundred seventy-one".