28543549440 has 608 divisors, whose sum is σ = 112340024064. Its totient is φ = 6039797760.

The previous prime is 28543549439. The next prime is 28543549451. The reversal of 28543549440 is 4494534582.

It is a Harshad number since it is a multiple of its sum of digits (48).

It is a self number, because there is not a number n which added to its sum of digits gives 28543549440.

It is a congruent number.

It is an unprimeable number.

It is a polite number, since it can be written in 31 ways as a sum of consecutive naturals, for example, 467927010 + ... + 467927070.

Almost surely, 2^28543549440 is an apocalyptic number.

28543549440 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 28543549440, and also a Zumkeller number, because its divisors can be partitioned in two sets with the same sum (56170012032).

28543549440 is an abundant number, since it is smaller than the sum of its proper divisors (83796474624).

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

28543549440 is an frugal number, since it uses more digits than its factorization.

28543549440 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 129 (or 95 counting only the distinct ones).

The product of its (nonzero) digits is 2764800, while the sum is 48.

The spelling of 28543549440 in words is "twenty-eight billion, five hundred forty-three million, five hundred forty-nine thousand, four hundred forty".