28928947 has 2 divisors, whose sum is σ = 28928948. Its totient is φ = 28928946.

The previous prime is 28928941. The next prime is 28928953. The reversal of 28928947 is 74982982.

It is a balanced prime because it is at equal distance from previous prime (28928941) and next prime (28928953).

It is a cyclic number.

It is not a de Polignac number, because 28928947 - 2¹¹ = 28926899 is a prime.

It is a self number, because there is not a number n which added to its sum of digits gives 28928947.

It is not a weakly prime, because it can be changed into another prime (28928941) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 14464473 + 14464474.

It is an arithmetic number, because the mean of its divisors is an integer number (14464474).

Almost surely, 2^28928947 is an apocalyptic number.

28928947 is a deficient number, since it is larger than the sum of its proper divisors (1).

28928947 is an equidigital number, since it uses as much as digits as its factorization.

28928947 is an evil number, because the sum of its binary digits is even.

The product of its digits is 580608, while the sum is 49.

The square root of 28928947 is about 5378.5636558472. The cubic root of 28928947 is about 306.9805608971.

The spelling of 28928947 in words is "twenty-eight million, nine hundred twenty-eight thousand, nine hundred forty-seven".