28057588 has 24 divisors (see below), whose sum is σ = 53022312. Its totient is φ = 12914304.

The previous prime is 28057583. The next prime is 28057597. The reversal of 28057588 is 88575082.

It can be written as a sum of positive squares in 4 ways, for example, as 7518564 + 20539024 = 2742^2 + 4532^2 .

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (28057583) by changing a digit.

It is a polite number, since it can be written in 7 ways as a sum of consecutive naturals, for example, 34806 + ... + 35602.

It is an arithmetic number, because the mean of its divisors is an integer number (2209263).

Almost surely, 2^28057588 is an apocalyptic number.

It is an amenable number.

28057588 is a deficient number, since it is larger than the sum of its proper divisors (24964724).

28057588 is a wasteful number, since it uses less digits than its factorization.

28057588 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 1491 (or 1489 counting only the distinct ones).

The product of its (nonzero) digits is 179200, while the sum is 43.

The square root of 28057588 is about 5296.9413815899. The cubic root of 28057588 is about 303.8669344922.

The spelling of 28057588 in words is "twenty-eight million, fifty-seven thousand, five hundred eighty-eight".