28860019 has 2 divisors, whose sum is σ = 28860020. Its totient is φ = 28860018.

The previous prime is 28860001. The next prime is 28860059. The reversal of 28860019 is 91006882.

It is a weak prime.

It is a cyclic number.

It is not a de Polignac number, because 28860019 - 2⁷ = 28859891 is a prime.

It is a super-2 number, since 2×28860019² = 1665801393360722, which contains 22 as substring.

It is not a weakly prime, because it can be changed into another prime (28860059) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 14430009 + 14430010.

It is an arithmetic number, because the mean of its divisors is an integer number (14430010).

Almost surely, 2^28860019 is an apocalyptic number.

28860019 is a deficient number, since it is larger than the sum of its proper divisors (1).

28860019 is an equidigital number, since it uses as much as digits as its factorization.

28860019 is an odious number, because the sum of its binary digits is odd.

The product of its (nonzero) digits is 6912, while the sum is 34.

The square root of 28860019 is about 5372.1521758044. The cubic root of 28860019 is about 306.7365563508.

The spelling of 28860019 in words is "twenty-eight million, eight hundred sixty thousand, nineteen".