28078088817 has 8 divisors (see below), whose sum is σ = 37465797280. Its totient is φ = 18704553120.

The previous prime is 28078088789. The next prime is 28078088837. The reversal of 28078088817 is 71888087082.

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

It is a de Polignac number, because none of the positive numbers 2^k-28078088817 is a prime.

It is a Duffinian number.

It is not an unprimeable number, because it can be changed into a prime (28078088837) 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, 3538567 + ... + 3546492.

It is an arithmetic number, because the mean of its divisors is an integer number (4683224660).

Almost surely, 2^28078088817 is an apocalyptic number.

It is an amenable number.

28078088817 is a deficient number, since it is larger than the sum of its proper divisors (9387708463).

28078088817 is a wasteful number, since it uses less digits than its factorization.

28078088817 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 7086383.

The product of its (nonzero) digits is 3211264, while the sum is 57.

The spelling of 28078088817 in words is "twenty-eight billion, seventy-eight million, eighty-eight thousand, eight hundred seventeen".