28141188 has 24 divisors (see below), whose sum is σ = 69525792. Its totient is φ = 8828544.

The previous prime is 28141163. The next prime is 28141189. The reversal of 28141188 is 88114182.

It is not an unprimeable number, because it can be changed into a prime (28141189) by changing a digit.

It is a polite number, since it can be written in 7 ways as a sum of consecutive naturals, for example, 68770 + ... + 69177.

It is an arithmetic number, because the mean of its divisors is an integer number (2896908).

Almost surely, 2^28141188 is an apocalyptic number.

It is an amenable number.

28141188 is an abundant number, since it is smaller than the sum of its proper divisors (41384604).

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

28141188 is a wasteful number, since it uses less digits than its factorization.

28141188 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 137971 (or 137969 counting only the distinct ones).

The product of its digits is 4096, while the sum is 33.

The square root of 28141188 is about 5304.8268586260. The cubic root of 28141188 is about 304.1684344761.

The spelling of 28141188 in words is "twenty-eight million, one hundred forty-one thousand, one hundred eighty-eight".