28525583 has 4 divisors (see below), whose sum is σ = 28570320. Its totient is φ = 28480848.

The previous prime is 28525579. The next prime is 28525621. The reversal of 28525583 is 38552582.

It is a semiprime because it is the product of two primes, and also an emirpimes, since its reverse is a distinct semiprime: 38552582 = 2 ⋅19276291.

It is a cyclic number.

It is not a de Polignac number, because 28525583 - 2² = 28525579 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 (28525513) 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, 21398 + ... + 22691.

It is an arithmetic number, because the mean of its divisors is an integer number (7142580).

Almost surely, 2^28525583 is an apocalyptic number.

28525583 is a deficient number, since it is larger than the sum of its proper divisors (44737).

28525583 is an equidigital number, since it uses as much as digits as its factorization.

28525583 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 44736.

The product of its digits is 96000, while the sum is 38.

The square root of 28525583 is about 5340.9346560317. The cubic root of 28525583 is about 305.5471072387.

The spelling of 28525583 in words is "twenty-eight million, five hundred twenty-five thousand, five hundred eighty-three".