28285238 has 8 divisors (see below), whose sum is σ = 42939288. Its totient is φ = 13972144.

The previous prime is 28285223. The next prime is 28285241. The reversal of 28285238 is 83258282.

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

It is a Curzon number.

It is a congruent number.

It is an unprimeable number.

It is a polite number, since it can be written in 3 ways as a sum of consecutive naturals, for example, 85031 + ... + 85362.

It is an arithmetic number, because the mean of its divisors is an integer number (5367411).

Almost surely, 2^28285238 is an apocalyptic number.

28285238 is a deficient number, since it is larger than the sum of its proper divisors (14654050).

28285238 is a wasteful number, since it uses less digits than its factorization.

28285238 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 170478.

The product of its digits is 61440, while the sum is 38.

The square root of 28285238 is about 5318.3867854830. The cubic root of 28285238 is about 304.6865470915.

The spelling of 28285238 in words is "twenty-eight million, two hundred eighty-five thousand, two hundred thirty-eight".