28078088805 has 128 divisors (see below), whose sum is σ = 55729766400. Its totient is φ = 13322714112.

The previous prime is 28078088789. The next prime is 28078088837. The reversal of 28078088805 is 50888087082.

It is not a de Polignac number, because 28078088805 - 2⁴ = 28078088789 is a prime.

It is a congruent number.

It is an unprimeable number.

It is a polite number, since it can be written in 127 ways as a sum of consecutive naturals, for example, 7075932 + ... + 7079898.

It is an arithmetic number, because the mean of its divisors is an integer number (435388800).

Almost surely, 2^28078088805 is an apocalyptic number.

It is an amenable number.

28078088805 is a deficient number, since it is larger than the sum of its proper divisors (27651677595).

28078088805 is a wasteful number, since it uses less digits than its factorization.

28078088805 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 4140 (or 4134 counting only the distinct ones).

The product of its (nonzero) digits is 2293760, while the sum is 54.

The spelling of 28078088805 in words is "twenty-eight billion, seventy-eight million, eighty-eight thousand, eight hundred five".