28268477 has 2 divisors, whose sum is σ = 28268478. Its totient is φ = 28268476.

The previous prime is 28268441. The next prime is 28268483. The reversal of 28268477 is 77486282.

It is a strong prime.

It can be written as a sum of positive squares in only one way, i.e., 22221796 + 6046681 = 4714^2 + 2459^2 .

It is a cyclic number.

It is not a de Polignac number, because 28268477 - 2⁸ = 28268221 is a prime.

It is a Chen prime.

It is a congruent number.

It is not a weakly prime, because it can be changed into another prime (28268377) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 14134238 + 14134239.

It is an arithmetic number, because the mean of its divisors is an integer number (14134239).

Almost surely, 2^28268477 is an apocalyptic number.

It is an amenable number.

28268477 is a deficient number, since it is larger than the sum of its proper divisors (1).

28268477 is an equidigital number, since it uses as much as digits as its factorization.

28268477 is an evil number, because the sum of its binary digits is even.

The product of its digits is 301056, while the sum is 44.

The square root of 28268477 is about 5316.8107921949. The cubic root of 28268477 is about 304.6263524383.

The spelling of 28268477 in words is "twenty-eight million, two hundred sixty-eight thousand, four hundred seventy-seven".