28338984 has 80 divisors (see below), whose sum is σ = 80346420. Its totient is φ = 9331200.

The previous prime is 28338943. The next prime is 28339001. The reversal of 28338984 is 48983382.

It can be written as a sum of positive squares in 2 ways, for example, as 28196100 + 142884 = 5310^2 + 378^2 .

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

It is an unprimeable number.

It is a pernicious number, because its binary representation contains a prime number (11) of ones.

It is a polite number, since it can be written in 19 ways as a sum of consecutive naturals, for example, 65232 + ... + 65664.

Almost surely, 2^28338984 is an apocalyptic number.

28338984 is a gapful number since it is divisible by the number (24) formed by its first and last digit.

It is an amenable number.

It is a practical number, because each smaller number is the sum of distinct divisors of 28338984, and also a Zumkeller number, because its divisors can be partitioned in two sets with the same sum (40173210).

28338984 is an abundant number, since it is smaller than the sum of its proper divisors (52007436).

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

28338984 is a wasteful number, since it uses less digits than its factorization.

28338984 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 552 (or 539 counting only the distinct ones).

The product of its digits is 331776, while the sum is 45.

The square root of 28338984 is about 5323.4372354711. The cubic root of 28338984 is about 304.8794076695.

The spelling of 28338984 in words is "twenty-eight million, three hundred thirty-eight thousand, nine hundred eighty-four".