28141288 has 24 divisors (see below), whose sum is σ = 61380450. Its totient is φ = 12060384.

The previous prime is 28141279. The next prime is 28141319. The reversal of 28141288 is 88214182.

It can be written as a sum of positive squares in only one way, i.e., 24980004 + 3161284 = 4998^2 + 1778^2 .

It is a nude number because it is divisible by every one of its digits.

It is an unprimeable number.

It is a polite number, since it can be written in 5 ways as a sum of consecutive naturals, for example, 35503 + ... + 36286.

Almost surely, 2^28141288 is an apocalyptic number.

28141288 is a gapful number since it is divisible by the number (28) formed by its first and last digit.

It is an amenable number.

28141288 is an abundant number, since it is smaller than the sum of its proper divisors (33239162).

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

28141288 is a wasteful number, since it uses less digits than its factorization.

28141288 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 71809 (or 71798 counting only the distinct ones).

The product of its digits is 8192, while the sum is 34.

The square root of 28141288 is about 5304.8362839960. The cubic root of 28141288 is about 304.1687947642.

The spelling of 28141288 in words is "twenty-eight million, one hundred forty-one thousand, two hundred eighty-eight".