28445326779 has 8 divisors (see below), whose sum is σ = 37973189632. Its totient is φ = 18940507560.

The previous prime is 28445326729. The next prime is 28445326781. The reversal of 28445326779 is 97762354482.

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

It is not a de Polignac number, because 28445326779 - 2²⁴ = 28428549563 is a prime.

It is a Duffinian number.

It is not an unprimeable number, because it can be changed into a prime (28445326729) 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, 5758027 + ... + 5762964.

It is an arithmetic number, because the mean of its divisors is an integer number (4746648704).

Almost surely, 2^28445326779 is an apocalyptic number.

28445326779 is a deficient number, since it is larger than the sum of its proper divisors (9527862853).

28445326779 is a wasteful number, since it uses less digits than its factorization.

28445326779 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 11521817.

The product of its digits is 20321280, while the sum is 57.

The spelling of 28445326779 in words is "twenty-eight billion, four hundred forty-five million, three hundred twenty-six thousand, seven hundred seventy-nine".