28516238 has 8 divisors (see below), whose sum is σ = 43817760. Its totient is φ = 13910320.

The previous prime is 28516231. The next prime is 28516247. The reversal of 28516238 is 83261582.

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

It is a junction number, because it is equal to n+sod(n) for n = 28516198 and 28516207.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (28516231) by changing a digit.

It is a polite number, since it can be written in 3 ways as a sum of consecutive naturals, for example, 173798 + ... + 173961.

It is an arithmetic number, because the mean of its divisors is an integer number (5477220).

Almost surely, 2^28516238 is an apocalyptic number.

28516238 is a deficient number, since it is larger than the sum of its proper divisors (15301522).

28516238 is a wasteful number, since it uses less digits than its factorization.

28516238 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 347802.

The product of its digits is 23040, while the sum is 35.

The square root of 28516238 is about 5340.0597374936. The cubic root of 28516238 is about 305.5137377825.

The spelling of 28516238 in words is "twenty-eight million, five hundred sixteen thousand, two hundred thirty-eight".