28271180 has 24 divisors (see below), whose sum is σ = 67851168. Its totient is φ = 9692928.

The previous prime is 28271179. The next prime is 28271189. The reversal of 28271180 is 8117282.

It is not an unprimeable number, because it can be changed into a prime (28271189) 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, 100829 + ... + 101108.

It is an arithmetic number, because the mean of its divisors is an integer number (2827132).

Almost surely, 2^28271180 is an apocalyptic number.

28271180 is a gapful number since it is divisible by the number (20) formed by its first and last digit.

It is an amenable number.

28271180 is an abundant number, since it is smaller than the sum of its proper divisors (39579988).

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

28271180 is a wasteful number, since it uses less digits than its factorization.

28271180 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 201953 (or 201951 counting only the distinct ones).

The product of its (nonzero) digits is 1792, while the sum is 29.

The square root of 28271180 is about 5317.0649798550. The cubic root of 28271180 is about 304.6360614720.

The spelling of 28271180 in words is "twenty-eight million, two hundred seventy-one thousand, one hundred eighty".