28335330 has 48 divisors (see below), whose sum is σ = 74201400. Its totient is φ = 7501824.

The previous prime is 28335317. The next prime is 28335341. The reversal of 28335330 is 3353382.

It is a happy number.

28335330 is a `hidden beast` number, since 283 + 353 + 30 = 666.

It can be written as a sum of positive squares in 4 ways, for example, as 6796449 + 21538881 = 2607^2 + 4641^2 .

It is a junction number, because it is equal to n+sod(n) for n = 28335294 and 28335303.

It is an unprimeable number.

It is a polite number, since it can be written in 23 ways as a sum of consecutive naturals, for example, 12354 + ... + 14466.

Almost surely, 2^28335330 is an apocalyptic number.

It is a practical number, because each smaller number is the sum of distinct divisors of 28335330, and also a Zumkeller number, because its divisors can be partitioned in two sets with the same sum (37100700).

28335330 is an abundant number, since it is smaller than the sum of its proper divisors (45866070).

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

28335330 is a wasteful number, since it uses less digits than its factorization.

28335330 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 2275 (or 2272 counting only the distinct ones).

The product of its (nonzero) digits is 6480, while the sum is 27.

The square root of 28335330 is about 5323.0940250948. The cubic root of 28335330 is about 304.8663034918.

The spelling of 28335330 in words is "twenty-eight million, three hundred thirty-five thousand, three hundred thirty".