28557883 has 4 divisors (see below), whose sum is σ = 28835248. Its totient is φ = 28280520.

The previous prime is 28557877. The next prime is 28557887. The reversal of 28557883 is 38875582.

It is a semiprime because it is the product of two primes, and also an emirpimes, since its reverse is a distinct semiprime: 38875582 = 2 ⋅19437791.

It is a cyclic number.

It is a de Polignac number, because none of the positive numbers 2^k-28557883 is a prime.

It is a Duffinian number.

It is not an unprimeable number, because it can be changed into a prime (28557887) 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, 138528 + ... + 138733.

It is an arithmetic number, because the mean of its divisors is an integer number (7208812).

Almost surely, 2^28557883 is an apocalyptic number.

28557883 is a deficient number, since it is larger than the sum of its proper divisors (277365).

28557883 is a wasteful number, since it uses less digits than its factorization.

28557883 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 277364.

The product of its digits is 537600, while the sum is 46.

The square root of 28557883 is about 5343.9576158499. The cubic root of 28557883 is about 305.6623891232.

The spelling of 28557883 in words is "twenty-eight million, five hundred fifty-seven thousand, eight hundred eighty-three".