28863619 has 2 divisors, whose sum is σ = 28863620. Its totient is φ = 28863618.

The previous prime is 28863581. The next prime is 28863647. The reversal of 28863619 is 91636882.

It is a strong prime.

It is a cyclic number.

It is not a de Polignac number, because 28863619 - 2⁷ = 28863491 is a prime.

It is a super-2 number, since 2×28863619² = 1666217003554322, which contains 22 as substring.

It is not a weakly prime, because it can be changed into another prime (28863119) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 14431809 + 14431810.

It is an arithmetic number, because the mean of its divisors is an integer number (14431810).

Almost surely, 2^28863619 is an apocalyptic number.

28863619 is a deficient number, since it is larger than the sum of its proper divisors (1).

28863619 is an equidigital number, since it uses as much as digits as its factorization.

28863619 is an evil number, because the sum of its binary digits is even.

The product of its digits is 124416, while the sum is 43.

The square root of 28863619 is about 5372.4872266018. The cubic root of 28863619 is about 306.7493099309.

The spelling of 28863619 in words is "twenty-eight million, eight hundred sixty-three thousand, six hundred nineteen".