28339188 has 48 divisors (see below), whose sum is σ = 68819520. Its totient is φ = 9068544.

The previous prime is 28339163. The next prime is 28339189. The reversal of 28339188 is 88193382.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (28339189) by changing a digit.

It is a polite number, since it can be written in 15 ways as a sum of consecutive naturals, for example, 36468 + ... + 37236.

It is an arithmetic number, because the mean of its divisors is an integer number (1433740).

Almost surely, 2^28339188 is an apocalyptic number.

It is an amenable number.

28339188 is an abundant number, since it is smaller than the sum of its proper divisors (40480332).

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

28339188 is a wasteful number, since it uses less digits than its factorization.

28339188 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 896 (or 894 counting only the distinct ones).

The product of its digits is 82944, while the sum is 42.

The square root of 28339188 is about 5323.4563959894. The cubic root of 28339188 is about 304.8801392324.

It can be divided in two parts, 2833 and 9188, that added together give a palindrome (12021).

The spelling of 28339188 in words is "twenty-eight million, three hundred thirty-nine thousand, one hundred eighty-eight".