28622487552 has 128 divisors (see below), whose sum is σ = 76609890720. Its totient is φ = 9505341440.

The previous prime is 28622487499. The next prime is 28622487571. The reversal of 28622487552 is 25578422682.

It is a tau number, because it is divible by the number of its divisors (128).

It is a junction number, because it is equal to n+sod(n) for n = 28622487495 and 28622487504.

It is an unprimeable number.

It is a polite number, since it can be written in 7 ways as a sum of consecutive naturals, for example, 48266968 + ... + 48267560.

Almost surely, 2^28622487552 is an apocalyptic number.

It is an amenable number.

It is a practical number, because each smaller number is the sum of distinct divisors of 28622487552, and also a Zumkeller number, because its divisors can be partitioned in two sets with the same sum (38304945360).

28622487552 is an abundant number, since it is smaller than the sum of its proper divisors (47987403168).

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

28622487552 is an frugal number, since it uses more digits than its factorization.

28622487552 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 1117 (or 1089 counting only the distinct ones).

The product of its digits is 4300800, while the sum is 51.

The spelling of 28622487552 in words is "twenty-eight billion, six hundred twenty-two million, four hundred eighty-seven thousand, five hundred fifty-two".