28471967 has 2 divisors, whose sum is σ = 28471968. Its totient is φ = 28471966.

The previous prime is 28471943. The next prime is 28471969. The reversal of 28471967 is 76917482.

It is a strong prime.

It is a cyclic number.

It is not a de Polignac number, because 28471967 - 2⁶ = 28471903 is a prime.

Together with 28471969, it forms a pair of twin primes.

It is a Chen prime.

It is a congruent number.

It is not a weakly prime, because it can be changed into another prime (28471969) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 14235983 + 14235984.

It is an arithmetic number, because the mean of its divisors is an integer number (14235984).

Almost surely, 2^28471967 is an apocalyptic number.

28471967 is a deficient number, since it is larger than the sum of its proper divisors (1).

28471967 is an equidigital number, since it uses as much as digits as its factorization.

28471967 is an odious number, because the sum of its binary digits is odd.

The product of its digits is 169344, while the sum is 44.

The square root of 28471967 is about 5335.9129490650. The cubic root of 28471967 is about 305.3555541767.

The spelling of 28471967 in words is "twenty-eight million, four hundred seventy-one thousand, nine hundred sixty-seven".