28434231685906 has 8 divisors (see below), whose sum is σ = 42987184911360. Its totient is φ = 14105170048788.

The previous prime is 28434231685903. The next prime is 28434231685961. The reversal of 28434231685906 is 60958613243482.

It is a happy number.

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 (28434231685903) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (23) of ones.

It is a polite number, since it can be written in 3 ways as a sum of consecutive naturals, for example, 55972896766 + ... + 55972897273.

It is an arithmetic number, because the mean of its divisors is an integer number (5373398113920).

Almost surely, 2^{28434231685906} is an apocalyptic number.

28434231685906 is a deficient number, since it is larger than the sum of its proper divisors (14552953225454).

28434231685906 is a wasteful number, since it uses less digits than its factorization.

28434231685906 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 111945794168.

The product of its (nonzero) digits is 59719680, while the sum is 61.

The spelling of 28434231685906 in words is "twenty-eight trillion, four hundred thirty-four billion, two hundred thirty-one million, six hundred eighty-five thousand, nine hundred six".