28520353930 has 8 divisors (see below), whose sum is σ = 51336637092. Its totient is φ = 11408141568.

The previous prime is 28520353903. The next prime is 28520353933. The reversal of 28520353930 is 3935302582.

It is a happy number.

It can be written as a sum of positive squares in 2 ways, for example, as 24267096841 + 4253257089 = 155779^2 + 65217^2 .

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 (28520353933) 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, 1426017687 + ... + 1426017706.

Almost surely, 2^28520353930 is an apocalyptic number.

28520353930 is a deficient number, since it is larger than the sum of its proper divisors (22816283162).

28520353930 is a wasteful number, since it uses less digits than its factorization.

28520353930 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 2852035400.

The product of its (nonzero) digits is 194400, while the sum is 40.

The spelling of 28520353930 in words is "twenty-eight billion, five hundred twenty million, three hundred fifty-three thousand, nine hundred thirty".