28920719 has 2 divisors, whose sum is σ = 28920720. Its totient is φ = 28920718.

The previous prime is 28920707. The next prime is 28920761. The reversal of 28920719 is 91702982.

It is a weak prime.

It is a cyclic number.

It is a de Polignac number, because none of the positive numbers 2^k-28920719 is a prime.

It is a super-2 number, since 2×28920719² = 1672815974953922, which contains 22 as substring.

It is a Chen prime.

It is equal to p_1795088 and since 28920719 and 1795088 have the same sum of digits, it is a Honaker prime.

It is a congruent number.

It is not a weakly prime, because it can be changed into another prime (28920779) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 14460359 + 14460360.

It is an arithmetic number, because the mean of its divisors is an integer number (14460360).

Almost surely, 2^28920719 is an apocalyptic number.

28920719 is a deficient number, since it is larger than the sum of its proper divisors (1).

28920719 is an equidigital number, since it uses as much as digits as its factorization.

28920719 is an odious number, because the sum of its binary digits is odd.

The product of its (nonzero) digits is 18144, while the sum is 38.

The square root of 28920719 is about 5377.7987132283. The cubic root of 28920719 is about 306.9514542315.

The spelling of 28920719 in words is "twenty-eight million, nine hundred twenty thousand, seven hundred nineteen".