28520166 has 16 divisors (see below), whose sum is σ = 59007600. Its totient is φ = 9178848.

The previous prime is 28520143. The next prime is 28520179. The reversal of 28520166 is 66102582.

It is a congruent number.

It is an unprimeable number.

It is a polite number, since it can be written in 7 ways as a sum of consecutive naturals, for example, 81781 + ... + 82128.

It is an arithmetic number, because the mean of its divisors is an integer number (3687975).

Almost surely, 2^28520166 is an apocalyptic number.

28520166 is an abundant number, since it is smaller than the sum of its proper divisors (30487434).

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

28520166 is a wasteful number, since it uses less digits than its factorization.

28520166 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 163943.

The product of its (nonzero) digits is 5760, while the sum is 30.

The square root of 28520166 is about 5340.4275109770. The cubic root of 28520166 is about 305.5277649117.

The spelling of 28520166 in words is "twenty-eight million, five hundred twenty thousand, one hundred sixty-six".