28128704342 has 4 divisors (see below), whose sum is σ = 42193056516. Its totient is φ = 14064352170.

The previous prime is 28128704291. The next prime is 28128704353. The reversal of 28128704342 is 24340782182.

28128704342 is digitally balanced in base 5, because in such base it contains all the possibile digits an equal number of times.

It is a semiprime because it is the product of two primes.

It is a self number, because there is not a number n which added to its sum of digits gives 28128704342.

It is a congruent number.

It is an unprimeable number.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 7032176084 + ... + 7032176087.

It is an arithmetic number, because the mean of its divisors is an integer number (10548264129).

Almost surely, 2^28128704342 is an apocalyptic number.

28128704342 is a deficient number, since it is larger than the sum of its proper divisors (14064352174).

28128704342 is a wasteful number, since it uses less digits than its factorization.

28128704342 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 14064352173.

The product of its (nonzero) digits is 172032, while the sum is 41.

The spelling of 28128704342 in words is "twenty-eight billion, one hundred twenty-eight million, seven hundred four thousand, three hundred forty-two".