28805019 has 8 divisors (see below), whose sum is σ = 38629392. Its totient is φ = 19092000.

The previous prime is 28805017. The next prime is 28805041. The reversal of 28805019 is 91050882.

It is a happy number.

It is a sphenic number, since it is the product of 3 distinct primes.

It is not a de Polignac number, because 28805019 - 2¹ = 28805017 is a prime.

It is a super-2 number, since 2×28805019² = 1659458239180722, which contains 22 as substring.

It is not an unprimeable number, because it can be changed into a prime (28805017) by changing a digit.

It is a polite number, since it can be written in 7 ways as a sum of consecutive naturals, for example, 27232 + ... + 28269.

It is an arithmetic number, because the mean of its divisors is an integer number (4828674).

Almost surely, 2^28805019 is an apocalyptic number.

28805019 is a deficient number, since it is larger than the sum of its proper divisors (9824373).

28805019 is a wasteful number, since it uses less digits than its factorization.

28805019 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 55677.

The product of its (nonzero) digits is 5760, while the sum is 33.

The square root of 28805019 is about 5367.0307433440. The cubic root of 28805019 is about 306.5415779743.

The spelling of 28805019 in words is "twenty-eight million, eight hundred five thousand, nineteen".