28159331842 has 8 divisors (see below), whose sum is σ = 42257047932. Its totient is φ = 14073649200.

The previous prime is 28159331807. The next prime is 28159331903. The reversal of 28159331842 is 24813395182.

It can be written as a sum of positive squares in 2 ways, for example, as 23356703241 + 4802628601 = 152829^2 + 69301^2 .

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

It is a super-2 number, since 2×28159331842² (a number of 22 digits) contains 22 as substring.

It is a junction number, because it is equal to n+sod(n) for n = 28159331792 and 28159331801.

It is an unprimeable number.

It is a polite number, since it can be written in 3 ways as a sum of consecutive naturals, for example, 3002509 + ... + 3011872.

Almost surely, 2^28159331842 is an apocalyptic number.

28159331842 is a deficient number, since it is larger than the sum of its proper divisors (14097716090).

28159331842 is a wasteful number, since it uses less digits than its factorization.

28159331842 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 6016724.

The product of its digits is 414720, while the sum is 46.

The spelling of 28159331842 in words is "twenty-eight billion, one hundred fifty-nine million, three hundred thirty-one thousand, eight hundred forty-two".