8728978042 has 4 divisors (see below), whose sum is σ = 13093467066. Its totient is φ = 4364489020.

The previous prime is 8728978007. The next prime is 8728978051. The reversal of 8728978042 is 2408798278.

It is a Cunningham number, because it is equal to 93429²+1.

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

It can be written as a sum of positive squares in only one way, i.e., 8728978041 + 1 = 93429^2 + 1^2 .

It is an unprimeable number.

It is a pernicious number, because its binary representation contains a prime number (13) of ones.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 2182244509 + ... + 2182244512.

Almost surely, 2^8728978042 is an apocalyptic number.

8728978042 is a deficient number, since it is larger than the sum of its proper divisors (4364489024).

8728978042 is a wasteful number, since it uses less digits than its factorization.

8728978042 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 4364489023.

The product of its (nonzero) digits is 3612672, while the sum is 55.

The square root of 8728978042 is about 93429.0000053517. Note that the first 5 decimals coincide. The cubic root of 8728978042 is about 2058.9910887291.

The spelling of 8728978042 in words is "eight billion, seven hundred twenty-eight million, nine hundred seventy-eight thousand, forty-two".