28184430906 has 12 divisors (see below), whose sum is σ = 61066267002. Its totient is φ = 9394810296.

The previous prime is 28184430893. The next prime is 28184430913. The reversal of 28184430906 is 60903448182.

It is a happy number.

It can be written as a sum of positive squares in only one way, i.e., 25171409025 + 3013021881 = 158655^2 + 54891^2 .

It is an unprimeable number.

It is a pernicious number, because its binary representation contains a prime number (19) of ones.

It is a polite number, since it can be written in 5 ways as a sum of consecutive naturals, for example, 782900841 + ... + 782900876.

Almost surely, 2^28184430906 is an apocalyptic number.

28184430906 is an abundant number, since it is smaller than the sum of its proper divisors (32881836096).

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

28184430906 is a wasteful number, since it uses less digits than its factorization.

28184430906 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 1565801725 (or 1565801722 counting only the distinct ones).

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

The spelling of 28184430906 in words is "twenty-eight billion, one hundred eighty-four million, four hundred thirty thousand, nine hundred six".