28238583 has 8 divisors (see below), whose sum is σ = 38017408. Its totient is φ = 18642744.

The previous prime is 28238569. The next prime is 28238591. The reversal of 28238583 is 38583282.

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

It is not a de Polignac number, because 28238583 - 2⁶ = 28238519 is a prime.

It is a Duffinian number.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (28238563) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (17) of ones.

It is a polite number, since it can be written in 7 ways as a sum of consecutive naturals, for example, 45385 + ... + 46002.

It is an arithmetic number, because the mean of its divisors is an integer number (4752176).

Almost surely, 2^28238583 is an apocalyptic number.

28238583 is a deficient number, since it is larger than the sum of its proper divisors (9778825).

28238583 is a wasteful number, since it uses less digits than its factorization.

28238583 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 91493.

The product of its digits is 92160, while the sum is 39.

The square root of 28238583 is about 5313.9987768158. The cubic root of 28238583 is about 304.5189334675.

The spelling of 28238583 in words is "twenty-eight million, two hundred thirty-eight thousand, five hundred eighty-three".