28304971 has 2 divisors, whose sum is σ = 28304972. Its totient is φ = 28304970.

The previous prime is 28304959. The next prime is 28304993. The reversal of 28304971 is 17940382.

It is a weak prime.

It is a cyclic number.

It is not a de Polignac number, because 28304971 - 2⁹ = 28304459 is a prime.

It is not a weakly prime, because it can be changed into another prime (28304921) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 14152485 + 14152486.

It is an arithmetic number, because the mean of its divisors is an integer number (14152486).

Almost surely, 2^28304971 is an apocalyptic number.

28304971 is a deficient number, since it is larger than the sum of its proper divisors (1).

28304971 is an equidigital number, since it uses as much as digits as its factorization.

28304971 is an evil number, because the sum of its binary digits is even.

The product of its (nonzero) digits is 12096, while the sum is 34.

The square root of 28304971 is about 5320.2416298510. The cubic root of 28304971 is about 304.7573847726.

The spelling of 28304971 in words is "twenty-eight million, three hundred four thousand, nine hundred seventy-one".