28773583 has 4 divisors (see below), whose sum is σ = 28789560. Its totient is φ = 28757608.

The previous prime is 28773553. The next prime is 28773601. The reversal of 28773583 is 38537782.

It is a semiprime because it is the product of two primes.

It is a cyclic number.

It is not a de Polignac number, because 28773583 - 2⁵ = 28773551 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 (28773523) 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, 4885 + ... + 9022.

It is an arithmetic number, because the mean of its divisors is an integer number (7197390).

Almost surely, 2^28773583 is an apocalyptic number.

28773583 is a deficient number, since it is larger than the sum of its proper divisors (15977).

28773583 is a wasteful number, since it uses less digits than its factorization.

28773583 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 15976.

The product of its digits is 282240, while the sum is 43.

The square root of 28773583 is about 5364.1013226821. The cubic root of 28773583 is about 306.4300239345.

The spelling of 28773583 in words is "twenty-eight million, seven hundred seventy-three thousand, five hundred eighty-three".