28075288 has 8 divisors (see below), whose sum is σ = 52641180. Its totient is φ = 14037640.

The previous prime is 28075253. The next prime is 28075291. The reversal of 28075288 is 88257082.

It is a tau number, because it is divible by the number of its divisors (8).

It is a self number, because there is not a number n which added to its sum of digits gives 28075288.

It is a congruent number.

It is an unprimeable number.

It is a pernicious number, because its binary representation contains a prime number (11) of ones.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 1754698 + ... + 1754713.

Almost surely, 2^28075288 is an apocalyptic number.

It is an amenable number.

28075288 is a deficient number, since it is larger than the sum of its proper divisors (24565892).

28075288 is a wasteful number, since it uses less digits than its factorization.

28075288 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 3509417 (or 3509413 counting only the distinct ones).

The product of its (nonzero) digits is 71680, while the sum is 40.

The square root of 28075288 is about 5298.6118936944. The cubic root of 28075288 is about 303.9308187452.

The spelling of 28075288 in words is "twenty-eight million, seventy-five thousand, two hundred eighty-eight".