28091474842 has 8 divisors (see below), whose sum is σ = 42219998100. Its totient is φ = 14018142144.

The previous prime is 28091474839. The next prime is 28091474869. The reversal of 28091474842 is 24847419082.

It can be written as a sum of positive squares in 2 ways, for example, as 27785889481 + 305585361 = 166691^2 + 17481^2 .

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

It is an unprimeable number.

It is a pernicious number, because its binary representation contains a prime number (17) of ones.

It is a polite number, since it can be written in 3 ways as a sum of consecutive naturals, for example, 13796367 + ... + 13798402.

Almost surely, 2^28091474842 is an apocalyptic number.

28091474842 is a deficient number, since it is larger than the sum of its proper divisors (14128523258).

28091474842 is a wasteful number, since it uses less digits than its factorization.

28091474842 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 27595280.

The product of its (nonzero) digits is 1032192, while the sum is 49.

The spelling of 28091474842 in words is "twenty-eight billion, ninety-one million, four hundred seventy-four thousand, eight hundred forty-two".