28219259 has 4 divisors (see below), whose sum is σ = 28408800. Its totient is φ = 28029720.

The previous prime is 28219211. The next prime is 28219277. The reversal of 28219259 is 95291282.

It is a semiprime because it is the product of two primes, and also an emirpimes, since its reverse is a distinct semiprime: 95291282 = 2 ⋅47645641.

It is a cyclic number.

It is not a de Polignac number, because 28219259 - 2¹² = 28215163 is a prime.

It is a Duffinian number.

It is not an unprimeable number, because it can be changed into a prime (28219559) 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, 94547 + ... + 94844.

It is an arithmetic number, because the mean of its divisors is an integer number (7102200).

Almost surely, 2^28219259 is an apocalyptic number.

28219259 is a deficient number, since it is larger than the sum of its proper divisors (189541).

28219259 is a wasteful number, since it uses less digits than its factorization.

28219259 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 189540.

The product of its digits is 25920, while the sum is 38.

The square root of 28219259 is about 5312.1802492009. The cubic root of 28219259 is about 304.4494556345.

The spelling of 28219259 in words is "twenty-eight million, two hundred nineteen thousand, two hundred fifty-nine".