28877447 has 2 divisors, whose sum is σ = 28877448. Its totient is φ = 28877446.

The previous prime is 28877377. The next prime is 28877477. The reversal of 28877447 is 74477882.

It is a strong prime.

It is a cyclic number.

It is not a de Polignac number, because 28877447 - 2¹⁶ = 28811911 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 (28877477) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 14438723 + 14438724.

It is an arithmetic number, because the mean of its divisors is an integer number (14438724).

Almost surely, 2^28877447 is an apocalyptic number.

28877447 is a deficient number, since it is larger than the sum of its proper divisors (1).

28877447 is an equidigital number, since it uses as much as digits as its factorization.

28877447 is an evil number, because the sum of its binary digits is even.

The product of its digits is 702464, while the sum is 47.

The square root of 28877447 is about 5373.7739997138. The cubic root of 28877447 is about 306.7982879918.

The spelling of 28877447 in words is "twenty-eight million, eight hundred seventy-seven thousand, four hundred forty-seven".