28957583 has 4 divisors (see below), whose sum is σ = 28971888. Its totient is φ = 28943280.

The previous prime is 28957561. The next prime is 28957637. The reversal of 28957583 is 38575982.

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 28957583 - 2¹² = 28953487 is a prime.

It is a super-2 number, since 2×28957583² = 1677083226403778, which contains 22 as substring.

It is a Duffinian number.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (28953583) 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 3 ways as a sum of consecutive naturals, for example, 3491 + ... + 8372.

It is an arithmetic number, because the mean of its divisors is an integer number (7242972).

Almost surely, 2^28957583 is an apocalyptic number.

28957583 is a deficient number, since it is larger than the sum of its proper divisors (14305).

28957583 is a wasteful number, since it uses less digits than its factorization.

28957583 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 14304.

The product of its digits is 604800, while the sum is 47.

The square root of 28957583 is about 5381.2250463998. The cubic root of 28957583 is about 307.0818181416.

The spelling of 28957583 in words is "twenty-eight million, nine hundred fifty-seven thousand, five hundred eighty-three".