28544971560 has 384 divisors, whose sum is σ = 105241006080. Its totient is φ = 6163272192.

The previous prime is 28544971519. The next prime is 28544971561. The reversal of 28544971560 is 6517944582.

It is a super-2 number, since 2×28544971560² (a number of 22 digits) contains 22 as substring.

It is not an unprimeable number, because it can be changed into a prime (28544971561) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (17) of ones.

It is a polite number, since it can be written in 95 ways as a sum of consecutive naturals, for example, 11223649 + ... + 11226191.

It is an arithmetic number, because the mean of its divisors is an integer number (274065120).

Almost surely, 2^28544971560 is an apocalyptic number.

28544971560 is a gapful number since it is divisible by the number (20) formed by its first and last digit.

It is an amenable number.

It is a practical number, because each smaller number is the sum of distinct divisors of 28544971560, and also a Zumkeller number, because its divisors can be partitioned in two sets with the same sum (52620503040).

28544971560 is an abundant number, since it is smaller than the sum of its proper divisors (76696034520).

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

28544971560 is a wasteful number, since it uses less digits than its factorization.

28544971560 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 2677 (or 2666 counting only the distinct ones).

The product of its (nonzero) digits is 2419200, while the sum is 51.

The spelling of 28544971560 in words is "twenty-eight billion, five hundred forty-four million, nine hundred seventy-one thousand, five hundred sixty".