28307066 has 16 divisors (see below), whose sum is σ = 45252864. Its totient is φ = 13249104.

The previous prime is 28307063. The next prime is 28307087. The reversal of 28307066 is 66070382.

It is a Curzon number.

It is not an unprimeable number, because it can be changed into a prime (28307063) by changing a digit.

It is a polite number, since it can be written in 7 ways as a sum of consecutive naturals, for example, 4385 + ... + 8708.

It is an arithmetic number, because the mean of its divisors is an integer number (2828304).

Almost surely, 2^28307066 is an apocalyptic number.

28307066 is a deficient number, since it is larger than the sum of its proper divisors (16945798).

28307066 is a wasteful number, since it uses less digits than its factorization.

28307066 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 13165.

The product of its (nonzero) digits is 12096, while the sum is 32.

The square root of 28307066 is about 5320.4385157616. The cubic root of 28307066 is about 304.7649034869.

The spelling of 28307066 in words is "twenty-eight million, three hundred seven thousand, sixty-six".