28487219 has 2 divisors, whose sum is σ = 28487220. Its totient is φ = 28487218.

The previous prime is 28487197. The next prime is 28487227. The reversal of 28487219 is 91278482.

It is a strong prime.

It is a cyclic number.

It is not a de Polignac number, because 28487219 - 2¹² = 28483123 is a prime.

It is a super-2 number, since 2×28487219² = 1623043292707922, which contains 22 as substring.

It is a Sophie Germain prime.

It is a Chen prime.

It is not a weakly prime, because it can be changed into another prime (28487269) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 14243609 + 14243610.

It is an arithmetic number, because the mean of its divisors is an integer number (14243610).

Almost surely, 2^28487219 is an apocalyptic number.

28487219 is a deficient number, since it is larger than the sum of its proper divisors (1).

28487219 is an equidigital number, since it uses as much as digits as its factorization.

28487219 is an evil number, because the sum of its binary digits is even.

The product of its digits is 64512, while the sum is 41.

The square root of 28487219 is about 5337.3419414536. The cubic root of 28487219 is about 305.4100692201.

The spelling of 28487219 in words is "twenty-eight million, four hundred eighty-seven thousand, two hundred nineteen".