28723583 has 8 divisors (see below), whose sum is σ = 33118368. Its totient is φ = 24401664.

The previous prime is 28723559. The next prime is 28723609. The reversal of 28723583 is 38532782.

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

It is not a de Polignac number, because 28723583 - 2⁸ = 28723327 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 (28723553) 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, 17366 + ... + 18947.

It is an arithmetic number, because the mean of its divisors is an integer number (4139796).

Almost surely, 2^28723583 is an apocalyptic number.

28723583 is a deficient number, since it is larger than the sum of its proper divisors (4394785).

28723583 is a wasteful number, since it uses less digits than its factorization.

28723583 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 36433.

The product of its digits is 80640, while the sum is 38.

The square root of 28723583 is about 5359.4386832951. The cubic root of 28723583 is about 306.2524260255.

The spelling of 28723583 in words is "twenty-eight million, seven hundred twenty-three thousand, five hundred eighty-three".