28665078 has 16 divisors (see below), whose sum is σ = 61740336. Its totient is φ = 8820000.

The previous prime is 28665041. The next prime is 28665101. The reversal of 28665078 is 87056682.

It is a congruent number.

It is an unprimeable number.

It is a polite number, since it can be written in 7 ways as a sum of consecutive naturals, for example, 183673 + ... + 183828.

It is an arithmetic number, because the mean of its divisors is an integer number (3858771).

Almost surely, 2^28665078 is an apocalyptic number.

28665078 is an abundant number, since it is smaller than the sum of its proper divisors (33075258).

It is a pseudoperfect number, because it is the sum of a subset of its proper divisors.

28665078 is a wasteful number, since it uses less digits than its factorization.

28665078 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 367519.

The product of its (nonzero) digits is 161280, while the sum is 42.

The square root of 28665078 is about 5353.9777735811. The cubic root of 28665078 is about 306.0443568489.

The spelling of 28665078 in words is "twenty-eight million, six hundred sixty-five thousand, seventy-eight".