28445326780 has 24 divisors (see below), whose sum is σ = 64330201152. Its totient is φ = 10502889792.

The previous prime is 28445326729. The next prime is 28445326781. The reversal of 28445326780 is 8762354482.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (28445326781) 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 7 ways as a sum of consecutive naturals, for example, 54702292 + ... + 54702811.

It is an arithmetic number, because the mean of its divisors is an integer number (2680425048).

Almost surely, 2^28445326780 is an apocalyptic number.

28445326780 is a gapful number since it is divisible by the number (20) formed by its first and last digit.

It is an amenable number.

28445326780 is an abundant number, since it is smaller than the sum of its proper divisors (35884874372).

It is a pseudoperfect number, because it is the sum of a subset of its proper divisors.

28445326780 is a wasteful number, since it uses less digits than its factorization.

28445326780 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 109405125 (or 109405123 counting only the distinct ones).

The product of its (nonzero) digits is 2580480, while the sum is 49.

The spelling of 28445326780 in words is "twenty-eight billion, four hundred forty-five million, three hundred twenty-six thousand, seven hundred eighty".