28847229 has 8 divisors (see below), whose sum is σ = 39004992. Its totient is φ = 18960480.

The previous prime is 28847219. The next prime is 28847243. The reversal of 28847229 is 92274882.

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

It is not a de Polignac number, because 28847229 - 2⁴ = 28847213 is a prime.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (28847219) 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, 67504 + ... + 67929.

It is an arithmetic number, because the mean of its divisors is an integer number (4875624).

Almost surely, 2^28847229 is an apocalyptic number.

It is an amenable number.

28847229 is a deficient number, since it is larger than the sum of its proper divisors (10157763).

28847229 is a wasteful number, since it uses less digits than its factorization.

28847229 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 135507.

The product of its digits is 129024, while the sum is 42.

The square root of 28847229 is about 5370.9616457391. The cubic root of 28847229 is about 306.6912371355.

The spelling of 28847229 in words is "twenty-eight million, eight hundred forty-seven thousand, two hundred twenty-nine".