28330930 has 8 divisors (see below), whose sum is σ = 50995692. Its totient is φ = 11332368.

The previous prime is 28330921. The next prime is 28330933. The reversal of 28330930 is 3903382.

It is a happy number.

It can be written as a sum of positive squares in 2 ways, for example, as 26101881 + 2229049 = 5109^2 + 1493^2 .

It is a sphenic number, since it is the product of 3 distinct primes.

It is not an unprimeable number, because it can be changed into a prime (28330933) by changing a digit.

It is a polite number, since it can be written in 3 ways as a sum of consecutive naturals, for example, 1416537 + ... + 1416556.

Almost surely, 2^28330930 is an apocalyptic number.

28330930 is a deficient number, since it is larger than the sum of its proper divisors (22664762).

28330930 is a wasteful number, since it uses less digits than its factorization.

28330930 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 2833100.

The product of its (nonzero) digits is 3888, while the sum is 28.

The square root of 28330930 is about 5322.6807155793. The cubic root of 28330930 is about 304.8505224725.

It can be divided in two parts, 283 and 30930, that added together give a palindrome (31213).

The spelling of 28330930 in words is "twenty-eight million, three hundred thirty thousand, nine hundred thirty".