28052978 has 16 divisors (see below), whose sum is σ = 42768000. Its totient is φ = 13798752.

The previous prime is 28052963. The next prime is 28053001. The reversal of 28052978 is 87925082.

It is a happy number.

It is a Curzon number.

It is an unprimeable number.

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 7 ways as a sum of consecutive naturals, for example, 63683 + ... + 64121.

It is an arithmetic number, because the mean of its divisors is an integer number (2673000).

Almost surely, 2^28052978 is an apocalyptic number.

28052978 is a deficient number, since it is larger than the sum of its proper divisors (14715022).

28052978 is a wasteful number, since it uses less digits than its factorization.

28052978 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 889.

The product of its (nonzero) digits is 80640, while the sum is 41.

The square root of 28052978 is about 5296.5062069255. The cubic root of 28052978 is about 303.8502913023.

The spelling of 28052978 in words is "twenty-eight million, fifty-two thousand, nine hundred seventy-eight".