28282144 has 24 divisors (see below), whose sum is σ = 60743088. Its totient is φ = 12855360.

The previous prime is 28282139. The next prime is 28282147. The reversal of 28282144 is 44128282.

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

It is not an unprimeable number, because it can be changed into a prime (28282147) by changing a digit.

It is a polite number, since it can be written in 3 ways as a sum of consecutive naturals, for example, 39822 + ... + 40525.

It is an arithmetic number, because the mean of its divisors is an integer number (2530962).

Almost surely, 2^28282144 is an apocalyptic number.

It is an amenable number.

28282144 is an abundant number, since it is smaller than the sum of its proper divisors (32460944).

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

28282144 is a wasteful number, since it uses less digits than its factorization.

28282144 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 80368 (or 80360 counting only the distinct ones).

The product of its digits is 8192, while the sum is 31.

The square root of 28282144 is about 5318.0958998499. The cubic root of 28282144 is about 304.6754372380.

The spelling of 28282144 in words is "twenty-eight million, two hundred eighty-two thousand, one hundred forty-four".