1028720023 has 2 divisors, whose sum is σ = 1028720024. Its totient is φ = 1028720022.

The previous prime is 1028720009. The next prime is 1028720041. The reversal of 1028720023 is 3200278201.

1028720023 is digitally balanced in base 2, because in such base it contains all the possibile digits an equal number of times.

It is a weak prime.

It is an emirp because it is prime and its reverse (3200278201) is a distict prime.

It is a cyclic number.

It is not a de Polignac number, because 1028720023 - 2⁹ = 1028719511 is a prime.

It is a super-2 number, since 2×1028720023² = 2116529771442241058, which contains 22 as substring.

It is a self number, because there is not a number n which added to its sum of digits gives 1028720023.

It is a congruent number.

It is not a weakly prime, because it can be changed into another prime (1028720083) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 514360011 + 514360012.

It is an arithmetic number, because the mean of its divisors is an integer number (514360012).

Almost surely, 2^1028720023 is an apocalyptic number.

1028720023 is a deficient number, since it is larger than the sum of its proper divisors (1).

1028720023 is an equidigital number, since it uses as much as digits as its factorization.

1028720023 is an odious number, because the sum of its binary digits is odd.

The product of its (nonzero) digits is 1344, while the sum is 25.

The square root of 1028720023 is about 32073.6655685003. The cubic root of 1028720023 is about 1009.4831270301.

Adding to 1028720023 its reverse (3200278201), we get a palindrome (4228998224).

The spelling of 1028720023 in words is "one billion, twenty-eight million, seven hundred twenty thousand, twenty-three".