28017966 has 16 divisors (see below), whose sum is σ = 56139984. Its totient is φ = 9321984.

The previous prime is 28017961. The next prime is 28017967. The reversal of 28017966 is 66971082.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (28017961) by changing a digit.

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, 585 + ... + 7508.

It is an arithmetic number, because the mean of its divisors is an integer number (3508749).

Almost surely, 2^28017966 is an apocalyptic number.

28017966 is an abundant number, since it is smaller than the sum of its proper divisors (28122018).

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

28017966 is a wasteful number, since it uses less digits than its factorization.

28017966 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 8675.

The product of its (nonzero) digits is 36288, while the sum is 39.

The square root of 28017966 is about 5293.1999773294. The cubic root of 28017966 is about 303.7238301558.

The spelling of 28017966 in words is "twenty-eight million, seventeen thousand, nine hundred sixty-six".