28020966445 has 16 divisors (see below), whose sum is σ = 33718422960. Its totient is φ = 22354675200.

The previous prime is 28020966419. The next prime is 28020966451. The reversal of 28020966445 is 54466902082.

It can be written as a sum of positive squares in 8 ways, for example, as 693900964 + 27327065481 = 26342^2 + 165309^2 .

It is not a de Polignac number, because 28020966445 - 2²³ = 28012577837 is a prime.

It is a junction number, because it is equal to n+sod(n) for n = 28020966395 and 28020966404.

It is a congruent number.

It is an unprimeable number.

It is a polite number, since it can be written in 15 ways as a sum of consecutive naturals, for example, 3593611 + ... + 3601399.

It is an arithmetic number, because the mean of its divisors is an integer number (2107401435).

Almost surely, 2^28020966445 is an apocalyptic number.

It is an amenable number.

28020966445 is a deficient number, since it is larger than the sum of its proper divisors (5697456515).

28020966445 is a wasteful number, since it uses less digits than its factorization.

28020966445 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 9696.

The product of its (nonzero) digits is 829440, while the sum is 46.

The spelling of 28020966445 in words is "twenty-eight billion, twenty million, nine hundred sixty-six thousand, four hundred forty-five".