28330530 has 32 divisors (see below), whose sum is σ = 69833664. Its totient is φ = 7350336.

The previous prime is 28330529. The next prime is 28330531. The reversal of 28330530 is 3503382.

It is an interprime number because it is at equal distance from previous prime (28330529) and next prime (28330531).

It is a Curzon number.

It is a self number, because there is not a number n which added to its sum of digits gives 28330530.

It is not an unprimeable number, because it can be changed into a prime (28330531) 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, 11652 + ... + 13871.

It is an arithmetic number, because the mean of its divisors is an integer number (2182302).

Almost surely, 2^28330530 is an apocalyptic number.

28330530 is an abundant number, since it is smaller than the sum of its proper divisors (41503134).

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

28330530 is a wasteful number, since it uses less digits than its factorization.

28330530 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 25570.

The product of its (nonzero) digits is 2160, while the sum is 24.

The square root of 28330530 is about 5322.6431403956. The cubic root of 28330530 is about 304.8490877533.

The spelling of 28330530 in words is "twenty-eight million, three hundred thirty thousand, five hundred thirty".