28726777 has 2 divisors, whose sum is σ = 28726778. Its totient is φ = 28726776.

The previous prime is 28726771. The next prime is 28726783. The reversal of 28726777 is 77762782.

It is a balanced prime because it is at equal distance from previous prime (28726771) and next prime (28726783).

It can be written as a sum of positive squares in only one way, i.e., 17464041 + 11262736 = 4179^2 + 3356^2 .

It is a cyclic number.

It is not a de Polignac number, because 28726777 - 2³ = 28726769 is a prime.

It is not a weakly prime, because it can be changed into another prime (28726771) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 14363388 + 14363389.

It is an arithmetic number, because the mean of its divisors is an integer number (14363389).

Almost surely, 2^28726777 is an apocalyptic number.

It is an amenable number.

28726777 is a deficient number, since it is larger than the sum of its proper divisors (1).

28726777 is an equidigital number, since it uses as much as digits as its factorization.

28726777 is an evil number, because the sum of its binary digits is even.

The product of its digits is 460992, while the sum is 46.

The square root of 28726777 is about 5359.7366539784. The cubic root of 28726777 is about 306.2637771395.

The spelling of 28726777 in words is "twenty-eight million, seven hundred twenty-six thousand, seven hundred seventy-seven".