28828335880 has 16 divisors (see below), whose sum is σ = 64863755820. Its totient is φ = 11531334336.

The previous prime is 28828335869. The next prime is 28828335989. The reversal of 28828335880 is 8853382882.

It can be written as a sum of positive squares in 2 ways, for example, as 28364622724 + 463713156 = 168418^2 + 21534^2 .

It is a super-2 number, since 2×28828335880² (a number of 22 digits) contains 22 as substring.

It is an unprimeable number.

It is a pernicious number, because its binary representation contains a prime number (19) of ones.

It is a polite number, since it can be written in 3 ways as a sum of consecutive naturals, for example, 360354159 + ... + 360354238.

Almost surely, 2^28828335880 is an apocalyptic number.

28828335880 is a gapful number since it is divisible by the number (20) formed by its first and last digit.

It is an amenable number.

28828335880 is an abundant number, since it is smaller than the sum of its proper divisors (36035419940).

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

28828335880 is a wasteful number, since it uses less digits than its factorization.

28828335880 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 720708408 (or 720708404 counting only the distinct ones).

The product of its (nonzero) digits is 5898240, while the sum is 55.

The spelling of 28828335880 in words is "twenty-eight billion, eight hundred twenty-eight million, three hundred thirty-five thousand, eight hundred eighty".