28998271 has 2 divisors, whose sum is σ = 28998272. Its totient is φ = 28998270.

The previous prime is 28998259. The next prime is 28998329. The reversal of 28998271 is 17289982.

It is a weak prime.

It is a cyclic number.

It is not a de Polignac number, because 28998271 - 2⁷ = 28998143 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 (28998971) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 14499135 + 14499136.

It is an arithmetic number, because the mean of its divisors is an integer number (14499136).

Almost surely, 2^28998271 is an apocalyptic number.

28998271 is a deficient number, since it is larger than the sum of its proper divisors (1).

28998271 is an equidigital number, since it uses as much as digits as its factorization.

28998271 is an evil number, because the sum of its binary digits is even.

The product of its digits is 145152, while the sum is 46.

The square root of 28998271 is about 5385.0042711218. The cubic root of 28998271 is about 307.2255766590.

Subtracting from 28998271 its sum of digits (46), we obtain a square (28998225 = 5385²).

The spelling of 28998271 in words is "twenty-eight million, nine hundred ninety-eight thousand, two hundred seventy-one".