28093477 has 2 divisors, whose sum is σ = 28093478. Its totient is φ = 28093476.

The previous prime is 28093463. The next prime is 28093517. The reversal of 28093477 is 77439082.

It is an a-pointer prime, because the next prime (28093517) can be obtained adding 28093477 to its sum of digits (40).

It is a weak prime.

It can be written as a sum of positive squares in only one way, i.e., 24611521 + 3481956 = 4961^2 + 1866^2 .

It is a cyclic number.

It is not a de Polignac number, because 28093477 - 2¹⁵ = 28060709 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 (28093447) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 14046738 + 14046739.

It is an arithmetic number, because the mean of its divisors is an integer number (14046739).

Almost surely, 2^28093477 is an apocalyptic number.

It is an amenable number.

28093477 is a deficient number, since it is larger than the sum of its proper divisors (1).

28093477 is an equidigital number, since it uses as much as digits as its factorization.

28093477 is an evil number, because the sum of its binary digits is even.

The product of its (nonzero) digits is 84672, while the sum is 40.

The square root of 28093477 is about 5300.3280087180. The cubic root of 28093477 is about 303.9964399687.

The spelling of 28093477 in words is "twenty-eight million, ninety-three thousand, four hundred seventy-seven".