28601791 has 2 divisors, whose sum is σ = 28601792. Its totient is φ = 28601790.

The previous prime is 28601767. The next prime is 28601813. The reversal of 28601791 is 19710682.

It is a happy number.

It is a strong prime.

It is a cyclic number.

It is not a de Polignac number, because 28601791 - 2⁵ = 28601759 is a prime.

It is a congruent number.

It is not a weakly prime, because it can be changed into another prime (28608791) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (17) of ones.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 14300895 + 14300896.

It is an arithmetic number, because the mean of its divisors is an integer number (14300896).

Almost surely, 2^28601791 is an apocalyptic number.

28601791 is a deficient number, since it is larger than the sum of its proper divisors (1).

28601791 is an equidigital number, since it uses as much as digits as its factorization.

28601791 is an odious number, because the sum of its binary digits is odd.

The product of its (nonzero) digits is 6048, while the sum is 34.

The square root of 28601791 is about 5348.0642292329. The cubic root of 28601791 is about 305.8189617905.

It can be divided in two parts, 28601 and 791, that added together give a palindrome (29392).

The spelling of 28601791 in words is "twenty-eight million, six hundred one thousand, seven hundred ninety-one".