86943758728 has 8 divisors (see below), whose sum is σ = 163019547630. Its totient is φ = 43471879360.

The previous prime is 86943758723. The next prime is 86943758743. The reversal of 86943758728 is 82785734968.

It can be written as a sum of positive squares in only one way, i.e., 83626229124 + 3317529604 = 289182^2 + 57598^2 .

It is a tau number, because it is divible by the number of its divisors (8).

It is a super-3 number, since 3×86943758728³ (a number of 34 digits) contains 333 as substring.

It is not an unprimeable number, because it can be changed into a prime (86943758723) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 5433984913 + ... + 5433984928.

Almost surely, 2^86943758728 is an apocalyptic number.

It is an amenable number.

86943758728 is a deficient number, since it is larger than the sum of its proper divisors (76075788902).

86943758728 is a wasteful number, since it uses less digits than its factorization.

86943758728 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 10867969847 (or 10867969843 counting only the distinct ones).

The product of its digits is 162570240, while the sum is 67.

The spelling of 86943758728 in words is "eighty-six billion, nine hundred forty-three million, seven hundred fifty-eight thousand, seven hundred twenty-eight".