28071539809 has 8 divisors (see below), whose sum is σ = 28437881472. Its totient is φ = 27705868080.

The previous prime is 28071539777. The next prime is 28071539819. The reversal of 28071539809 is 90893517082.

It is a sphenic number, since it is the product of 3 distinct primes.

It is a cyclic number.

It is not a de Polignac number, because 28071539809 - 2⁵ = 28071539777 is a prime.

It is a super-2 number, since 2×28071539809² (a number of 22 digits) contains 22 as substring.

It is a Duffinian number.

It is not an unprimeable number, because it can be changed into a prime (28071539819) 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, 82857 + ... + 251014.

It is an arithmetic number, because the mean of its divisors is an integer number (3554735184).

Almost surely, 2^28071539809 is an apocalyptic number.

It is an amenable number.

28071539809 is a deficient number, since it is larger than the sum of its proper divisors (366341663).

28071539809 is a wasteful number, since it uses less digits than its factorization.

28071539809 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 334967.

The product of its (nonzero) digits is 1088640, while the sum is 52.

The spelling of 28071539809 in words is "twenty-eight billion, seventy-one million, five hundred thirty-nine thousand, eight hundred nine".