28239282 has 24 divisors (see below), whose sum is σ = 64406160. Its totient is φ = 8917560.

The previous prime is 28239271. The next prime is 28239287. The reversal of 28239282 is 28293282.

It is not an unprimeable number, because it can be changed into a prime (28239287) by changing a digit.

It is a polite number, since it can be written in 11 ways as a sum of consecutive naturals, for example, 40944 + ... + 41627.

It is an arithmetic number, because the mean of its divisors is an integer number (2683590).

Almost surely, 2^28239282 is an apocalyptic number.

28239282 is an abundant number, since it is smaller than the sum of its proper divisors (36166878).

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

28239282 is a wasteful number, since it uses less digits than its factorization.

28239282 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 82598 (or 82595 counting only the distinct ones).

The product of its digits is 27648, while the sum is 36.

The square root of 28239282 is about 5314.0645460890. The cubic root of 28239282 is about 304.5214460697.

The spelling of 28239282 in words is "twenty-eight million, two hundred thirty-nine thousand, two hundred eighty-two".