28015966 has 32 divisors (see below), whose sum is σ = 48934368. Its totient is φ = 11888640.

The previous prime is 28015963. The next prime is 28015979. The reversal of 28015966 is 66951082.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (28015963) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (17) of ones.

It is a polite number, since it can be written in 15 ways as a sum of consecutive naturals, for example, 64486 + ... + 64918.

It is an arithmetic number, because the mean of its divisors is an integer number (1529199).

Almost surely, 2^28015966 is an apocalyptic number.

28015966 is a deficient number, since it is larger than the sum of its proper divisors (20918402).

28015966 is a wasteful number, since it uses less digits than its factorization.

28015966 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 636.

The product of its (nonzero) digits is 25920, while the sum is 37.

The square root of 28015966 is about 5293.0110523217. The cubic root of 28015966 is about 303.7166031011.

The spelling of 28015966 in words is "twenty-eight million, fifteen thousand, nine hundred sixty-six".