28720332419 has 2 divisors, whose sum is σ = 28720332420. Its totient is φ = 28720332418.

The previous prime is 28720332413. The next prime is 28720332481. The reversal of 28720332419 is 91423302782.

It is a weak prime.

It is a cyclic number.

It is not a de Polignac number, because 28720332419 - 2⁸ = 28720332163 is a prime.

It is a super-2 number, since 2×28720332419² (a number of 22 digits) contains 22 as substring.

It is not a weakly prime, because it can be changed into another prime (28720332413) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (23) of ones.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 14360166209 + 14360166210.

It is an arithmetic number, because the mean of its divisors is an integer number (14360166210).

Almost surely, 2^28720332419 is an apocalyptic number.

28720332419 is a deficient number, since it is larger than the sum of its proper divisors (1).

28720332419 is an equidigital number, since it uses as much as digits as its factorization.

28720332419 is an odious number, because the sum of its binary digits is odd.

The product of its (nonzero) digits is 145152, while the sum is 41.

The spelling of 28720332419 in words is "twenty-eight billion, seven hundred twenty million, three hundred thirty-two thousand, four hundred nineteen".