28143434042 has 4 divisors (see below), whose sum is σ = 42215151066. Its totient is φ = 14071717020.

The previous prime is 28143434029. The next prime is 28143434083. The reversal of 28143434042 is 24043434182.

It is a semiprime because it is the product of two primes, and also an emirpimes, since its reverse is a distinct semiprime: 24043434182 = 2 ⋅12021717091.

It can be written as a sum of positive squares in only one way, i.e., 15755521441 + 12387912601 = 125521^2 + 111301^2 .

It is a junction number, because it is equal to n+sod(n) for n = 28143433993 and 28143434011.

It is an unprimeable number.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 7035858509 + ... + 7035858512.

Almost surely, 2^28143434042 is an apocalyptic number.

28143434042 is a deficient number, since it is larger than the sum of its proper divisors (14071717024).

28143434042 is a wasteful number, since it uses less digits than its factorization.

28143434042 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 14071717023.

The product of its (nonzero) digits is 73728, while the sum is 35.

The spelling of 28143434042 in words is "twenty-eight billion, one hundred forty-three million, four hundred thirty-four thousand, forty-two".