728244071 has 2 divisors, whose sum is σ = 728244072. Its totient is φ = 728244070.

The previous prime is 728244061. The next prime is 728244109. The reversal of 728244071 is 170442827.

It is a happy number.

It is a weak prime.

It is an emirp because it is prime and its reverse (170442827) is a distict prime.

It is a cyclic number.

It is not a de Polignac number, because 728244071 - 2¹⁸ = 727981927 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 (728244061) 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, 364122035 + 364122036.

It is an arithmetic number, because the mean of its divisors is an integer number (364122036).

Almost surely, 2^728244071 is an apocalyptic number.

728244071 is a deficient number, since it is larger than the sum of its proper divisors (1).

728244071 is an equidigital number, since it uses as much as digits as its factorization.

728244071 is an odious number, because the sum of its binary digits is odd.

The product of its (nonzero) digits is 25088, while the sum is 35.

The square root of 728244071 is about 26985.9976839842. The cubic root of 728244071 is about 899.6888105206.

Adding to 728244071 its reverse (170442827), we get a palindrome (898686898).

The spelling of 728244071 in words is "seven hundred twenty-eight million, two hundred forty-four thousand, seventy-one".