28290271 has 2 divisors, whose sum is σ = 28290272. Its totient is φ = 28290270.

The previous prime is 28290263. The next prime is 28290307. The reversal of 28290271 is 17209282.

It is a weak prime.

It is a cyclic number.

It is not a de Polignac number, because 28290271 - 2³ = 28290263 is a prime.

It is a congruent number.

It is not a weakly prime, because it can be changed into another prime (28290371) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 14145135 + 14145136.

It is an arithmetic number, because the mean of its divisors is an integer number (14145136).

Almost surely, 2^28290271 is an apocalyptic number.

28290271 is a deficient number, since it is larger than the sum of its proper divisors (1).

28290271 is an equidigital number, since it uses as much as digits as its factorization.

28290271 is an evil number, because the sum of its binary digits is even.

The product of its (nonzero) digits is 4032, while the sum is 31.

The square root of 28290271 is about 5318.8599342340. The cubic root of 28290271 is about 304.7046177242.

It can be divided in two parts, 28290 and 271, that added together give a 4-th power (28561 = 13⁴).

The spelling of 28290271 in words is "twenty-eight million, two hundred ninety thousand, two hundred seventy-one".