28910051 has 2 divisors, whose sum is σ = 28910052. Its totient is φ = 28910050.

The previous prime is 28910041. The next prime is 28910053. The reversal of 28910051 is 15001982.

It is a happy number.

It is a strong prime.

It is a cyclic number.

It is a de Polignac number, because none of the positive numbers 2^k-28910051 is a prime.

Together with 28910053, it forms a pair of twin primes.

It is a Chen prime.

It is a self number, because there is not a number n which added to its sum of digits gives 28910051.

It is not a weakly prime, because it can be changed into another prime (28910053) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (13) of ones.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 14455025 + 14455026.

It is an arithmetic number, because the mean of its divisors is an integer number (14455026).

Almost surely, 2^28910051 is an apocalyptic number.

28910051 is a deficient number, since it is larger than the sum of its proper divisors (1).

28910051 is an equidigital number, since it uses as much as digits as its factorization.

28910051 is an odious number, because the sum of its binary digits is odd.

The product of its (nonzero) digits is 720, while the sum is 26.

The square root of 28910051 is about 5376.8067661020. The cubic root of 28910051 is about 306.9137078114.

The spelling of 28910051 in words is "twenty-eight million, nine hundred ten thousand, fifty-one".