28666016 has 12 divisors (see below), whose sum is σ = 56436282. Its totient is φ = 14332992.

The previous prime is 28665983. The next prime is 28666021. The reversal of 28666016 is 61066682.

It can be written as a sum of positive squares in only one way, i.e., 23001616 + 5664400 = 4796^2 + 2380^2 .

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, 447875 + ... + 447938.

Almost surely, 2^28666016 is an apocalyptic number.

It is an amenable number.

28666016 is a deficient number, since it is larger than the sum of its proper divisors (27770266).

28666016 is an equidigital number, since it uses as much as digits as its factorization.

28666016 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 895823 (or 895815 counting only the distinct ones).

The product of its (nonzero) digits is 20736, while the sum is 35.

The square root of 28666016 is about 5354.0653712856. The cubic root of 28666016 is about 306.0476950162.

The spelling of 28666016 in words is "twenty-eight million, six hundred sixty-six thousand, sixteen".