28247861042 has 4 divisors (see below), whose sum is σ = 42371791566. Its totient is φ = 14123930520.

The previous prime is 28247861009. The next prime is 28247861069. The reversal of 28247861042 is 24016874282.

It is a Cunningham number, because it is equal to 168071²+1.

It is a semiprime because it is the product of two primes, and also an emirpimes, since its reverse is a distinct semiprime: 24016874282 = 2 ⋅12008437141.

It can be written as a sum of positive squares in only one way, i.e., 28247861041 + 1 = 168071^2 + 1^2 .

It is a junction number, because it is equal to n+sod(n) for n = 28247860984 and 28247861002.

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 as a sum of consecutive naturals, namely, 7061965259 + ... + 7061965262.

Almost surely, 2^28247861042 is an apocalyptic number.

28247861042 is a deficient number, since it is larger than the sum of its proper divisors (14123930524).

28247861042 is a wasteful number, since it uses less digits than its factorization.

28247861042 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 14123930523.

The product of its (nonzero) digits is 344064, while the sum is 44.

The spelling of 28247861042 in words is "twenty-eight billion, two hundred forty-seven million, eight hundred sixty-one thousand, forty-two".