28057619 has 2 divisors, whose sum is σ = 28057620. Its totient is φ = 28057618.

The previous prime is 28057597. The next prime is 28057639. The reversal of 28057619 is 91675082.

It is a strong prime.

It is a cyclic number.

It is not a de Polignac number, because 28057619 - 2²⁴ = 11280403 is a prime.

It is a super-2 number, since 2×28057619² = 1574459967898322, which contains 22 as substring.

It is a Chen prime.

It is not a weakly prime, because it can be changed into another prime (28057639) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 14028809 + 14028810.

It is an arithmetic number, because the mean of its divisors is an integer number (14028810).

Almost surely, 2^28057619 is an apocalyptic number.

28057619 is a deficient number, since it is larger than the sum of its proper divisors (1).

28057619 is an equidigital number, since it uses as much as digits as its factorization.

28057619 is an odious number, because the sum of its binary digits is odd.

The product of its (nonzero) digits is 30240, while the sum is 38.

The square root of 28057619 is about 5296.9443078062. The cubic root of 28057619 is about 303.8670464034.

The spelling of 28057619 in words is "twenty-eight million, fifty-seven thousand, six hundred nineteen".