28645619 has 2 divisors, whose sum is σ = 28645620. Its totient is φ = 28645618.

The previous prime is 28645601. The next prime is 28645627. The reversal of 28645619 is 91654682.

It is a happy number.

It is a strong prime.

It is a cyclic number.

It is not a de Polignac number, because 28645619 - 2²⁰ = 27597043 is a prime.

It is a super-2 number, since 2×28645619² = 1641142975786322, which contains 22 as substring.

It is a Chen prime.

It is not a weakly prime, because it can be changed into another prime (28645699) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 14322809 + 14322810.

It is an arithmetic number, because the mean of its divisors is an integer number (14322810).

Almost surely, 2^28645619 is an apocalyptic number.

28645619 is a deficient number, since it is larger than the sum of its proper divisors (1).

28645619 is an equidigital number, since it uses as much as digits as its factorization.

28645619 is an evil number, because the sum of its binary digits is even.

The product of its digits is 103680, while the sum is 41.

The square root of 28645619 is about 5352.1602180802. The cubic root of 28645619 is about 305.9750894612.

The spelling of 28645619 in words is "twenty-eight million, six hundred forty-five thousand, six hundred nineteen".