28444640068020 has 48 divisors (see below), whose sum is σ = 86885446027968. Its totient is φ = 6895670319360.

The previous prime is 28444640068003. The next prime is 28444640068021. The reversal of 28444640068020 is 2086004644482.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (28444640068021) 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 15 ways as a sum of consecutive naturals, for example, 21548969089 + ... + 21548970408.

It is an arithmetic number, because the mean of its divisors is an integer number (1810113458916).

Almost surely, 2^{28444640068020} is an apocalyptic number.

28444640068020 is a gapful number since it is divisible by the number (20) formed by its first and last digit.

It is an amenable number.

28444640068020 is an abundant number, since it is smaller than the sum of its proper divisors (58440805959948).

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

28444640068020 is a wasteful number, since it uses less digits than its factorization.

28444640068020 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 43097939520 (or 43097939518 counting only the distinct ones).

The product of its (nonzero) digits is 2359296, while the sum is 48.

The spelling of 28444640068020 in words is "twenty-eight trillion, four hundred forty-four billion, six hundred forty million, sixty-eight thousand, twenty".