28802219 has 4 divisors (see below), whose sum is σ = 28905000. Its totient is φ = 28699440.

The previous prime is 28802173. The next prime is 28802237. The reversal of 28802219 is 91220882.

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 28802219 - 2⁸ = 28801963 is a prime.

It is a super-2 number, since 2×28802219² = 1659135638647922, which contains 22 as substring.

It is a Duffinian number.

It is not an unprimeable number, because it can be changed into a prime (28802419) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (17) of ones.

It is a polite number, since it can be written in 3 ways as a sum of consecutive naturals, for example, 50969 + ... + 51530.

It is an arithmetic number, because the mean of its divisors is an integer number (7226250).

Almost surely, 2^28802219 is an apocalyptic number.

28802219 is a deficient number, since it is larger than the sum of its proper divisors (102781).

28802219 is a wasteful number, since it uses less digits than its factorization.

28802219 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 102780.

The product of its (nonzero) digits is 4608, while the sum is 32.

The square root of 28802219 is about 5366.7698851358. The cubic root of 28802219 is about 306.5316451656.

The spelling of 28802219 in words is "twenty-eight million, eight hundred two thousand, two hundred nineteen".