28857305488 has 180 divisors, whose sum is σ = 67670963920. Its totient is φ = 11878289280.

The previous prime is 28857305467. The next prime is 28857305489. The reversal of 28857305488 is 88450375882.

It is not an unprimeable number, because it can be changed into a prime (28857305489) by changing a digit.

It is a polite number, since it can be written in 35 ways as a sum of consecutive naturals, for example, 19457995 + ... + 19459477.

Almost surely, 2^28857305488 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 28857305488, and also a Zumkeller number, because its divisors can be partitioned in two sets with the same sum (33835481960).

28857305488 is an abundant number, since it is smaller than the sum of its proper divisors (38813658432).

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

28857305488 is a wasteful number, since it uses less digits than its factorization.

28857305488 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 1578 (or 1538 counting only the distinct ones).

The product of its (nonzero) digits is 17203200, while the sum is 58.

The spelling of 28857305488 in words is "twenty-eight billion, eight hundred fifty-seven million, three hundred five thousand, four hundred eighty-eight".