28880887880 has 64 divisors (see below), whose sum is σ = 70634773440. Its totient is φ = 10564031232.

The previous prime is 28880887879. The next prime is 28880887897. The reversal of 28880887880 is 8878808882.

It is a Harshad number since it is a multiple of its sum of digits (65).

It is an unprimeable number.

It is a pernicious number, because its binary representation contains a prime number (17) of ones.

It is a polite number, since it can be written in 15 ways as a sum of consecutive naturals, for example, 203894 + ... + 315173.

It is an arithmetic number, because the mean of its divisors is an integer number (1103668335).

Almost surely, 2^28880887880 is an apocalyptic number.

28880887880 is a gapful number since it is divisible by the number (20) formed by its first and last digit.

It is an amenable number.

28880887880 is an abundant number, since it is smaller than the sum of its proper divisors (41753885560).

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

28880887880 is a wasteful number, since it uses less digits than its factorization.

28880887880 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 519198 (or 519194 counting only the distinct ones).

The product of its (nonzero) digits is 29360128, while the sum is 65.

The spelling of 28880887880 in words is "twenty-eight billion, eight hundred eighty million, eight hundred eighty-seven thousand, eight hundred eighty".