28344619 has 4 divisors (see below), whose sum is σ = 28947744. Its totient is φ = 27741496.

The previous prime is 28344587. The next prime is 28344649. The reversal of 28344619 is 91644382.

It is a semiprime because it is the product of two primes.

It is a cyclic number.

It is not a de Polignac number, because 28344619 - 2⁵ = 28344587 is a prime.

It is a super-2 number, since 2×28344619² = 1606834852510322, which contains 22 as substring.

It is a Duffinian number.

It is not an unprimeable number, because it can be changed into a prime (28344649) by changing a digit.

It is a polite number, since it can be written in 3 ways as a sum of consecutive naturals, for example, 301492 + ... + 301585.

It is an arithmetic number, because the mean of its divisors is an integer number (7236936).

Almost surely, 2^28344619 is an apocalyptic number.

28344619 is a deficient number, since it is larger than the sum of its proper divisors (603125).

28344619 is an equidigital number, since it uses as much as digits as its factorization.

28344619 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 603124.

The product of its digits is 41472, while the sum is 37.

The square root of 28344619 is about 5323.9664724714. The cubic root of 28344619 is about 304.8996140114.

The spelling of 28344619 in words is "twenty-eight million, three hundred forty-four thousand, six hundred nineteen".