28128355742 has 4 divisors (see below), whose sum is σ = 42192533616. Its totient is φ = 14064177870.

The previous prime is 28128355741. The next prime is 28128355751. The reversal of 28128355742 is 24755382182.

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

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (28128355741) by changing a digit.

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, 7032088934 + ... + 7032088937.

It is an arithmetic number, because the mean of its divisors is an integer number (10548133404).

Almost surely, 2^28128355742 is an apocalyptic number.

28128355742 is a deficient number, since it is larger than the sum of its proper divisors (14064177874).

28128355742 is a wasteful number, since it uses less digits than its factorization.

28128355742 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 14064177873.

The product of its digits is 1075200, while the sum is 47.

The spelling of 28128355742 in words is "twenty-eight billion, one hundred twenty-eight million, three hundred fifty-five thousand, seven hundred forty-two".