28872583 has 4 divisors (see below), whose sum is σ = 28884960. Its totient is φ = 28860208.

The previous prime is 28872553. The next prime is 28872587. The reversal of 28872583 is 38527882.

It is a semiprime because it is the product of two primes, and also a brilliant number, because the two primes have the same length.

It is a cyclic number.

It is not a de Polignac number, because 28872583 - 2⁵ = 28872551 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 (28872587) 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, 1510 + ... + 7747.

It is an arithmetic number, because the mean of its divisors is an integer number (7221240).

Almost surely, 2^28872583 is an apocalyptic number.

28872583 is a deficient number, since it is larger than the sum of its proper divisors (12377).

28872583 is an equidigital number, since it uses as much as digits as its factorization.

28872583 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 12376.

The product of its digits is 215040, while the sum is 43.

The square root of 28872583 is about 5373.3214123110. The cubic root of 28872583 is about 306.7810617383.

The spelling of 28872583 in words is "twenty-eight million, eight hundred seventy-two thousand, five hundred eighty-three".