28488655880 has 64 divisors (see below), whose sum is σ = 65029944960. Its totient is φ = 11230299648.

The previous prime is 28488655861. The next prime is 28488655889. The reversal of 28488655880 is 8855688482.

It is not an unprimeable number, because it can be changed into a prime (28488655889) by changing a digit.

It is a polite number, since it can be written in 15 ways as a sum of consecutive naturals, for example, 4502399 + ... + 4508721.

It is an arithmetic number, because the mean of its divisors is an integer number (1016092890).

Almost surely, 2^28488655880 is an apocalyptic number.

28488655880 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 28488655880, and also a Zumkeller number, because its divisors can be partitioned in two sets with the same sum (32514972480).

28488655880 is an abundant number, since it is smaller than the sum of its proper divisors (36541289080).

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

28488655880 is a wasteful number, since it uses less digits than its factorization.

28488655880 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 7950 (or 7946 counting only the distinct ones).

The product of its (nonzero) digits is 39321600, while the sum is 62.

The spelling of 28488655880 in words is "twenty-eight billion, four hundred eighty-eight million, six hundred fifty-five thousand, eight hundred eighty".