28201180 has 24 divisors (see below), whose sum is σ = 67683168. Its totient is φ = 9668928.

The previous prime is 28201087. The next prime is 28201189. The reversal of 28201180 is 8110282.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (28201189) 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, 100579 + ... + 100858.

It is an arithmetic number, because the mean of its divisors is an integer number (2820132).

Almost surely, 2^28201180 is an apocalyptic number.

28201180 is a gapful number since it is divisible by the number (20) formed by its first and last digit.

It is an amenable number.

28201180 is an abundant number, since it is smaller than the sum of its proper divisors (39481988).

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

28201180 is a wasteful number, since it uses less digits than its factorization.

28201180 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 201453 (or 201451 counting only the distinct ones).

The product of its (nonzero) digits is 256, while the sum is 22.

The square root of 28201180 is about 5310.4783212061. The cubic root of 28201180 is about 304.3844253708.

The spelling of 28201180 in words is "twenty-eight million, two hundred one thousand, one hundred eighty".