28671619 has 2 divisors, whose sum is σ = 28671620. Its totient is φ = 28671618.

The previous prime is 28671611. The next prime is 28671631. The reversal of 28671619 is 91617682.

It is a weak prime.

It is a cyclic number.

It is not a de Polignac number, because 28671619 - 2³ = 28671611 is a prime.

It is a super-2 number, since 2×28671619² = 1644123472162322, which contains 22 as substring.

It is not a weakly prime, because it can be changed into another prime (28671611) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 14335809 + 14335810.

It is an arithmetic number, because the mean of its divisors is an integer number (14335810).

Almost surely, 2^28671619 is an apocalyptic number.

28671619 is a deficient number, since it is larger than the sum of its proper divisors (1).

28671619 is an equidigital number, since it uses as much as digits as its factorization.

28671619 is an odious number, because the sum of its binary digits is odd.

The product of its digits is 36288, while the sum is 40.

The square root of 28671619 is about 5354.5885929733. The cubic root of 28671619 is about 306.0676335330.

The spelling of 28671619 in words is "twenty-eight million, six hundred seventy-one thousand, six hundred nineteen".