28549164 has 72 divisors (see below), whose sum is σ = 80898048. Its totient is φ = 7798560.

The previous prime is 28549133. The next prime is 28549177. The reversal of 28549164 is 46194582.

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 in 23 ways as a sum of consecutive naturals, for example, 12469 + ... + 14579.

It is an arithmetic number, because the mean of its divisors is an integer number (1123584).

Almost surely, 2^28549164 is an apocalyptic number.

It is an amenable number.

It is a practical number, because each smaller number is the sum of distinct divisors of 28549164, and also a Zumkeller number, because its divisors can be partitioned in two sets with the same sum (40449024).

28549164 is an abundant number, since it is smaller than the sum of its proper divisors (52348884).

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

28549164 is a wasteful number, since it uses less digits than its factorization.

28549164 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 2155 (or 2146 counting only the distinct ones).

The product of its digits is 69120, while the sum is 39.

The square root of 28549164 is about 5343.1417724032. The cubic root of 28549164 is about 305.6312787215.

The spelling of 28549164 in words is "twenty-eight million, five hundred forty-nine thousand, one hundred sixty-four".