28444747965980 has 48 divisors (see below), whose sum is σ = 60365971080576. Its totient is φ = 11257669708800.

The previous prime is 28444747965919. The next prime is 28444747966007. The reversal of 28444747965980 is 8956974744482.

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, 1731149 + ... + 7738628.

It is an arithmetic number, because the mean of its divisors is an integer number (1257624397512).

Almost surely, 2^{28444747965980} is an apocalyptic number.

28444747965980 is a gapful number since it is divisible by the number (20) formed by its first and last digit.

It is an amenable number.

28444747965980 is an abundant number, since it is smaller than the sum of its proper divisors (31921223114596).

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

28444747965980 is a wasteful number, since it uses less digits than its factorization.

28444747965980 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 9471374 (or 9471372 counting only the distinct ones).

The product of its (nonzero) digits is 3901685760, while the sum is 77.

The spelling of 28444747965980 in words is "twenty-eight trillion, four hundred forty-four billion, seven hundred forty-seven million, nine hundred sixty-five thousand, nine hundred eighty".