28540168 has 16 divisors (see below), whose sum is σ = 53569980. Its totient is φ = 14254848.

The previous prime is 28540163. The next prime is 28540189. The reversal of 28540168 is 86104582.

It can be written as a sum of positive squares in 2 ways, for example, as 25220484 + 3319684 = 5022^2 + 1822^2 .

It is not an unprimeable number, because it can be changed into a prime (28540163) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (13) of ones.

It is a polite number, since it can be written in 3 ways as a sum of consecutive naturals, for example, 12180 + ... + 14332.

Almost surely, 2^28540168 is an apocalyptic number.

It is an amenable number.

28540168 is a deficient number, since it is larger than the sum of its proper divisors (25029812).

28540168 is a wasteful number, since it uses less digits than its factorization.

28540168 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 3816 (or 3812 counting only the distinct ones).

The product of its (nonzero) digits is 15360, while the sum is 34.

The square root of 28540168 is about 5342.2998792655. The cubic root of 28540168 is about 305.5991733117.

The spelling of 28540168 in words is "twenty-eight million, five hundred forty thousand, one hundred sixty-eight".