2028684871 has 4 divisors (see below), whose sum is σ = 2031187144. Its totient is φ = 2026182600.

The previous prime is 2028684859. The next prime is 2028684899. The reversal of 2028684871 is 1784868202.

It is a happy number.

It is a semiprime because it is the product of two primes.

It is a cyclic number.

It is not a de Polignac number, because 2028684871 - 2¹⁵ = 2028652103 is a prime.

It is a Duffinian number.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (2028684071) 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 3 ways as a sum of consecutive naturals, for example, 1249920 + ... + 1251541.

It is an arithmetic number, because the mean of its divisors is an integer number (507796786).

Almost surely, 2^2028684871 is an apocalyptic number.

2028684871 is a deficient number, since it is larger than the sum of its proper divisors (2502273).

2028684871 is an equidigital number, since it uses as much as digits as its factorization.

2028684871 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 2502272.

The product of its (nonzero) digits is 344064, while the sum is 46.

The square root of 2028684871 is about 45040.9244021479. The cubic root of 2028684871 is about 1265.9159256835.

The spelling of 2028684871 in words is "two billion, twenty-eight million, six hundred eighty-four thousand, eight hundred seventy-one".