28871571080 has 32 divisors (see below), whose sum is σ = 70866584640. Its totient is φ = 10498752960.

The previous prime is 28871571073. The next prime is 28871571083. The reversal of 28871571080 is 8017517882.

It is a Smith number, since the sum of its digits (47) coincides with the sum of the digits of its prime factors.

It is not an unprimeable number, because it can be changed into a prime (28871571083) by changing a digit.

It is a polite number, since it can be written in 7 ways as a sum of consecutive naturals, for example, 32808164 + ... + 32809043.

It is an arithmetic number, because the mean of its divisors is an integer number (2214580770).

Almost surely, 2^28871571080 is an apocalyptic number.

28871571080 is a gapful number since it is divisible by the number (20) formed by its first and last digit.

It is an amenable number.

28871571080 is an abundant number, since it is smaller than the sum of its proper divisors (41995013560).

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

28871571080 is a wasteful number, since it uses less digits than its factorization.

28871571080 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 65617229 (or 65617225 counting only the distinct ones).

The product of its (nonzero) digits is 250880, while the sum is 47.

The spelling of 28871571080 in words is "twenty-eight billion, eight hundred seventy-one million, five hundred seventy-one thousand, eighty".