28625219 has 8 divisors (see below), whose sum is σ = 32747520. Its totient is φ = 24511176.

The previous prime is 28625173. The next prime is 28625231. The reversal of 28625219 is 91252682.

It is a happy number.

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

It is a cyclic number.

It is not a de Polignac number, because 28625219 - 2²⁰ = 27576643 is a prime.

It is a super-2 number, since 2×28625219² = 1638806325595922, which contains 22 as substring.

It is a Duffinian number.

It is not an unprimeable number, because it can be changed into a prime (28625249) 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, 10412 + ... + 12870.

It is an arithmetic number, because the mean of its divisors is an integer number (4093440).

Almost surely, 2^28625219 is an apocalyptic number.

28625219 is a deficient number, since it is larger than the sum of its proper divisors (4122301).

28625219 is a wasteful number, since it uses less digits than its factorization.

28625219 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 4129.

The product of its digits is 17280, while the sum is 35.

The square root of 28625219 is about 5350.2541061150. The cubic root of 28625219 is about 305.9024387459.

The spelling of 28625219 in words is "twenty-eight million, six hundred twenty-five thousand, two hundred nineteen".