28702871 has 2 divisors, whose sum is σ = 28702872. Its totient is φ = 28702870.

The previous prime is 28702823. The next prime is 28702903. The reversal of 28702871 is 17820782.

It is a strong prime.

It is a cyclic number.

It is a de Polignac number, because none of the positive numbers 2^k-28702871 is a prime.

It is a Chen prime.

It is a congruent number.

It is not a weakly prime, because it can be changed into another prime (28702771) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 14351435 + 14351436.

It is an arithmetic number, because the mean of its divisors is an integer number (14351436).

Almost surely, 2^28702871 is an apocalyptic number.

28702871 is a deficient number, since it is larger than the sum of its proper divisors (1).

28702871 is an equidigital number, since it uses as much as digits as its factorization.

28702871 is an evil number, because the sum of its binary digits is even.

The product of its (nonzero) digits is 12544, while the sum is 35.

The square root of 28702871 is about 5357.5060429271. The cubic root of 28702871 is about 306.1787974965.

It can be divided in two parts, 2870 and 2871, that multiplied together give a triangular number (8239770 = T₄₀₅₉).

The spelling of 28702871 in words is "twenty-eight million, seven hundred two thousand, eight hundred seventy-one".