28361288 has 8 divisors (see below), whose sum is σ = 53177430. Its totient is φ = 14180640.

The previous prime is 28361269. The next prime is 28361293. The reversal of 28361288 is 88216382.

It can be written as a sum of positive squares in only one way, i.e., 23600164 + 4761124 = 4858^2 + 2182^2 .

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

It is an unprimeable number.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 1772573 + ... + 1772588.

Almost surely, 2^28361288 is an apocalyptic number.

It is an amenable number.

28361288 is a deficient number, since it is larger than the sum of its proper divisors (24816142).

28361288 is a wasteful number, since it uses less digits than its factorization.

28361288 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 3545167 (or 3545163 counting only the distinct ones).

The product of its digits is 36864, while the sum is 38.

The square root of 28361288 is about 5325.5317105431. The cubic root of 28361288 is about 304.9593710998.

The spelling of 28361288 in words is "twenty-eight million, three hundred sixty-one thousand, two hundred eighty-eight".