28630271 has 2 divisors, whose sum is σ = 28630272. Its totient is φ = 28630270.

The previous prime is 28630241. The next prime is 28630297. The reversal of 28630271 is 17203682.

It is a happy number.

It is a strong prime.

It is a cyclic number.

It is not a de Polignac number, because 28630271 - 2¹⁴ = 28613887 is a prime.

It is equal to p_1778213 and since 28630271 and 1778213 have the same sum of digits, it is a Honaker prime.

It is a congruent number.

It is not a weakly prime, because it can be changed into another prime (28630211) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 14315135 + 14315136.

It is an arithmetic number, because the mean of its divisors is an integer number (14315136).

Almost surely, 2^28630271 is an apocalyptic number.

28630271 is a deficient number, since it is larger than the sum of its proper divisors (1).

28630271 is an equidigital number, since it uses as much as digits as its factorization.

28630271 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 29.

The square root of 28630271 is about 5350.7262123940. The cubic root of 28630271 is about 305.9204336966.

The spelling of 28630271 in words is "twenty-eight million, six hundred thirty thousand, two hundred seventy-one".