28886180 has 12 divisors (see below), whose sum is σ = 60661020. Its totient is φ = 11554464.

The previous prime is 28886177. The next prime is 28886189. The reversal of 28886180 is 8168882.

It can be written as a sum of positive squares in 2 ways, for example, as 9048064 + 19838116 = 3008^2 + 4454^2 .

It is a super-2 number, since 2×28886180² = 1668822789984800, which contains 22 as substring.

It is not an unprimeable number, because it can be changed into a prime (28886189) by changing a digit.

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 3 ways as a sum of consecutive naturals, for example, 722135 + ... + 722174.

It is an arithmetic number, because the mean of its divisors is an integer number (5055085).

Almost surely, 2^28886180 is an apocalyptic number.

28886180 is a gapful number since it is divisible by the number (20) formed by its first and last digit.

It is an amenable number.

28886180 is an abundant number, since it is smaller than the sum of its proper divisors (31774840).

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

28886180 is a wasteful number, since it uses less digits than its factorization.

28886180 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 1444318 (or 1444316 counting only the distinct ones).

The product of its (nonzero) digits is 49152, while the sum is 41.

The square root of 28886180 is about 5374.5864957223. The cubic root of 28886180 is about 306.8292117712.

It can be divided in two parts, 288 and 86180, that added together give a palindrome (86468).

The spelling of 28886180 in words is "twenty-eight million, eight hundred eighty-six thousand, one hundred eighty".