28445326777 has 24 divisors (see below), whose sum is σ = 33436108800. Its totient is φ = 24127286400.

The previous prime is 28445326729. The next prime is 28445326781. The reversal of 28445326777 is 77762354482.

It is not a de Polignac number, because 28445326777 - 2¹¹ = 28445324729 is a prime.

It is a Duffinian number.

It is not an unprimeable number, because it can be changed into a prime (28445326277) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (23) of ones.

It is a polite number, since it can be written in 23 ways as a sum of consecutive naturals, for example, 2489724 + ... + 2501122.

It is an arithmetic number, because the mean of its divisors is an integer number (1393171200).

Almost surely, 2^28445326777 is an apocalyptic number.

It is an amenable number.

28445326777 is a deficient number, since it is larger than the sum of its proper divisors (4990782023).

28445326777 is a wasteful number, since it uses less digits than its factorization.

28445326777 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 11941 (or 11934 counting only the distinct ones).

The product of its digits is 15805440, while the sum is 55.

The spelling of 28445326777 in words is "twenty-eight billion, four hundred forty-five million, three hundred twenty-six thousand, seven hundred seventy-seven".