7868834728 has 16 divisors (see below), whose sum is σ = 14766088500. Its totient is φ = 3931211136.

The previous prime is 7868834723. The next prime is 7868834747. The reversal of 7868834728 is 8274388687.

It can be written as a sum of positive squares in 2 ways, for example, as 6652359844 + 1216474884 = 81562^2 + 34878^2 .

It is not an unprimeable number, because it can be changed into a prime (7868834723) by changing a digit.

It is a polite number, since it can be written in 3 ways as a sum of consecutive naturals, for example, 390333 + ... + 409996.

Almost surely, 2^7868834728 is an apocalyptic number.

It is an amenable number.

7868834728 is a deficient number, since it is larger than the sum of its proper divisors (6897253772).

7868834728 is a wasteful number, since it uses less digits than its factorization.

7868834728 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 801564 (or 801560 counting only the distinct ones).

The product of its digits is 28901376, while the sum is 61.

The square root of 7868834728 is about 88706.4525725158. The cubic root of 7868834728 is about 1989.0092732660.

The spelling of 7868834728 in words is "seven billion, eight hundred sixty-eight million, eight hundred thirty-four thousand, seven hundred twenty-eight".