28704474742 has 4 divisors (see below), whose sum is σ = 43056712116. Its totient is φ = 14352237370.

The previous prime is 28704474737. The next prime is 28704474749. The reversal of 28704474742 is 24747440782.

It is a semiprime because it is the product of two primes, and also an emirpimes, since its reverse is a distinct semiprime: 24747440782 = 2 ⋅12373720391.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (28704474749) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 7176118684 + ... + 7176118687.

It is an arithmetic number, because the mean of its divisors is an integer number (10764178029).

Almost surely, 2^28704474742 is an apocalyptic number.

28704474742 is a deficient number, since it is larger than the sum of its proper divisors (14352237374).

28704474742 is a wasteful number, since it uses less digits than its factorization.

28704474742 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 14352237373.

The product of its (nonzero) digits is 2809856, while the sum is 49.

The spelling of 28704474742 in words is "twenty-eight billion, seven hundred four million, four hundred seventy-four thousand, seven hundred forty-two".