28055583 has 24 divisors (see below), whose sum is σ = 41946528. Its totient is φ = 18055872.

The previous prime is 28055581. The next prime is 28055623. The reversal of 28055583 is 38555082.

28055583 is a `hidden beast` number, since 28 + 0 + 55 + 583 = 666.

It is not a de Polignac number, because 28055583 - 2¹ = 28055581 is a prime.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (28055581) by changing a digit.

It is a polite number, since it can be written in 23 ways as a sum of consecutive naturals, for example, 57366 + ... + 57852.

It is an arithmetic number, because the mean of its divisors is an integer number (1747772).

Almost surely, 2^28055583 is an apocalyptic number.

28055583 is a deficient number, since it is larger than the sum of its proper divisors (13890945).

28055583 is a wasteful number, since it uses less digits than its factorization.

28055583 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 703 (or 700 counting only the distinct ones).

The product of its (nonzero) digits is 48000, while the sum is 36.

The square root of 28055583 is about 5296.7521180437. The cubic root of 28055583 is about 303.8596961922.

The spelling of 28055583 in words is "twenty-eight million, fifty-five thousand, five hundred eighty-three".