28489551552 has 448 divisors, whose sum is σ = 107804590080. Its totient is φ = 7160140800.

The previous prime is 28489551511. The next prime is 28489551553. The reversal of 28489551552 is 25515598482.

28489551552 is a `hidden beast` number, since 2 + 8 + 4 + 89 + 5 + 5 + 1 + 552 = 666.

It is a tau number, because it is divible by the number of its divisors (448).

It is a Harshad number since it is a multiple of its sum of digits (54).

It is not an unprimeable number, because it can be changed into a prime (28489551553) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (13) of ones.

It is a polite number, since it can be written in 63 ways as a sum of consecutive naturals, for example, 4121283 + ... + 4128189.

Almost surely, 2^28489551552 is an apocalyptic number.

28489551552 is a gapful number since it is divisible by the number (22) 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 28489551552, and also a Zumkeller number, because its divisors can be partitioned in two sets with the same sum (53902295040).

28489551552 is an abundant number, since it is smaller than the sum of its proper divisors (79315038528).

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

28489551552 is a wasteful number, since it uses less digits than its factorization.

28489551552 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 6977 (or 6961 counting only the distinct ones).

The product of its digits is 5760000, while the sum is 54.

The spelling of 28489551552 in words is "twenty-eight billion, four hundred eighty-nine million, five hundred fifty-one thousand, five hundred fifty-two".