28703728042 has 16 divisors (see below), whose sum is σ = 47613160512. Its totient is φ = 12868420320.

The previous prime is 28703727973. The next prime is 28703728049. The reversal of 28703728042 is 24082730782.

It is a happy number.

It is a self number, because there is not a number n which added to its sum of digits gives 28703728042.

It is not an unprimeable number, because it can be changed into a prime (28703728049) by changing a digit.

It is a polite number, since it can be written in 7 ways as a sum of consecutive naturals, for example, 8934798 + ... + 8938009.

It is an arithmetic number, because the mean of its divisors is an integer number (2975822532).

Almost surely, 2^28703728042 is an apocalyptic number.

28703728042 is a gapful number since it is divisible by the number (22) formed by its first and last digit.

28703728042 is a deficient number, since it is larger than the sum of its proper divisors (18909432470).

28703728042 is a wasteful number, since it uses less digits than its factorization.

28703728042 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 17872893.

The product of its (nonzero) digits is 301056, while the sum is 43.

The spelling of 28703728042 in words is "twenty-eight billion, seven hundred three million, seven hundred twenty-eight thousand, forty-two".