28090277 has 2 divisors, whose sum is σ = 28090278. Its totient is φ = 28090276.

The previous prime is 28090253. The next prime is 28090301. The reversal of 28090277 is 77209082.

It is a balanced prime because it is at equal distance from previous prime (28090253) and next prime (28090301).

It can be written as a sum of positive squares in only one way, i.e., 22335076 + 5755201 = 4726^2 + 2399^2 .

It is a cyclic number.

It is not a de Polignac number, because 28090277 - 2⁶ = 28090213 is a prime.

It is a congruent number.

It is not a weakly prime, because it can be changed into another prime (28090217) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 14045138 + 14045139.

It is an arithmetic number, because the mean of its divisors is an integer number (14045139).

Almost surely, 2^28090277 is an apocalyptic number.

It is an amenable number.

28090277 is a deficient number, since it is larger than the sum of its proper divisors (1).

28090277 is an equidigital number, since it uses as much as digits as its factorization.

28090277 is an odious number, because the sum of its binary digits is odd.

The product of its (nonzero) digits is 14112, while the sum is 35.

The square root of 28090277 is about 5300.0261320110. The cubic root of 28090277 is about 303.9848972472.

The spelling of 28090277 in words is "twenty-eight million, ninety thousand, two hundred seventy-seven".