28671791 has 2 divisors, whose sum is σ = 28671792. Its totient is φ = 28671790.

The previous prime is 28671787. The next prime is 28671803. The reversal of 28671791 is 19717682.

It is a weak prime.

It is a cyclic number.

It is not a de Polignac number, because 28671791 - 2² = 28671787 is a prime.

It is a super-3 number, since 3×28671791³ (a number of 23 digits) contains 333 as substring.

It is a Chen prime.

It is a congruent number.

It is not a weakly prime, because it can be changed into another prime (28671701) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 14335895 + 14335896.

It is an arithmetic number, because the mean of its divisors is an integer number (14335896).

Almost surely, 2^28671791 is an apocalyptic number.

28671791 is a deficient number, since it is larger than the sum of its proper divisors (1).

28671791 is an equidigital number, since it uses as much as digits as its factorization.

28671791 is an evil number, because the sum of its binary digits is even.

The product of its digits is 42336, while the sum is 41.

The square root of 28671791 is about 5354.6046539404. The cubic root of 28671791 is about 306.0682455613.

The spelling of 28671791 in words is "twenty-eight million, six hundred seventy-one thousand, seven hundred ninety-one".