28730419 has 2 divisors, whose sum is σ = 28730420. Its totient is φ = 28730418.

The previous prime is 28730417. The next prime is 28730431. The reversal of 28730419 is 91403782.

It is a weak prime.

It is a cyclic number.

It is not a de Polignac number, because 28730419 - 2¹ = 28730417 is a prime.

It is a super-2 number, since 2×28730419² = 1650873951831122, which contains 22 as substring.

Together with 28730417, it forms a pair of twin primes.

It is not a weakly prime, because it can be changed into another prime (28730417) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (13) of ones.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 14365209 + 14365210.

It is an arithmetic number, because the mean of its divisors is an integer number (14365210).

Almost surely, 2^28730419 is an apocalyptic number.

28730419 is a deficient number, since it is larger than the sum of its proper divisors (1).

28730419 is an equidigital number, since it uses as much as digits as its factorization.

28730419 is an odious number, because the sum of its binary digits is odd.

The product of its (nonzero) digits is 12096, while the sum is 34.

The square root of 28730419 is about 5360.0763987093. The cubic root of 28730419 is about 306.2767193680.

The spelling of 28730419 in words is "twenty-eight million, seven hundred thirty thousand, four hundred nineteen".