28230293 has 8 divisors (see below), whose sum is σ = 34745088. Its totient is φ = 22335984.

The previous prime is 28230289. The next prime is 28230299. The reversal of 28230293 is 39203282.

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 28230293 - 2² = 28230289 is a prime.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (28230299) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (13) of ones.

It is a polite number, since it can be written in 7 ways as a sum of consecutive naturals, for example, 155021 + ... + 155202.

It is an arithmetic number, because the mean of its divisors is an integer number (4343136).

Almost surely, 2^28230293 is an apocalyptic number.

It is an amenable number.

28230293 is a deficient number, since it is larger than the sum of its proper divisors (6514795).

28230293 is a wasteful number, since it uses less digits than its factorization.

28230293 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 310243.

The product of its (nonzero) digits is 5184, while the sum is 29.

The square root of 28230293 is about 5313.2187043260. The cubic root of 28230293 is about 304.4891313461.

The spelling of 28230293 in words is "twenty-eight million, two hundred thirty thousand, two hundred ninety-three".