28871023 has 2 divisors, whose sum is σ = 28871024. Its totient is φ = 28871022.

The previous prime is 28871021. The next prime is 28871039. The reversal of 28871023 is 32017882.

It is a weak prime.

It is a cyclic number.

It is not a de Polignac number, because 28871023 - 2¹ = 28871021 is a prime.

Together with 28871021, it forms a pair of twin primes.

It is a congruent number.

It is not a weakly prime, because it can be changed into another prime (28871021) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 14435511 + 14435512.

It is an arithmetic number, because the mean of its divisors is an integer number (14435512).

Almost surely, 2^28871023 is an apocalyptic number.

28871023 is a deficient number, since it is larger than the sum of its proper divisors (1).

28871023 is an equidigital number, since it uses as much as digits as its factorization.

28871023 is an evil number, because the sum of its binary digits is even.

The product of its (nonzero) digits is 5376, while the sum is 31.

The square root of 28871023 is about 5373.1762487378. The cubic root of 28871023 is about 306.7755364611.

The spelling of 28871023 in words is "twenty-eight million, eight hundred seventy-one thousand, twenty-three".