28726771 has 2 divisors, whose sum is σ = 28726772. Its totient is φ = 28726770.

The previous prime is 28726769. The next prime is 28726777. The reversal of 28726771 is 17762782.

It is a weak prime.

It is a cyclic number.

It is not a de Polignac number, because 28726771 - 2¹ = 28726769 is a prime.

Together with 28726769, it forms a pair of twin primes.

It is not a weakly prime, because it can be changed into another prime (28726777) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 14363385 + 14363386.

It is an arithmetic number, because the mean of its divisors is an integer number (14363386).

Almost surely, 2^28726771 is an apocalyptic number.

28726771 is a deficient number, since it is larger than the sum of its proper divisors (1).

28726771 is an equidigital number, since it uses as much as digits as its factorization.

28726771 is an evil number, because the sum of its binary digits is even.

The product of its digits is 65856, while the sum is 40.

The square root of 28726771 is about 5359.7360942494. The cubic root of 28726771 is about 306.2637558169.

The spelling of 28726771 in words is "twenty-eight million, seven hundred twenty-six thousand, seven hundred seventy-one".