28827906820 has 24 divisors (see below), whose sum is σ = 61138000728. Its totient is φ = 11416992000.

The previous prime is 28827906817. The next prime is 28827906901. The reversal of 28827906820 is 2860972882.

It can be written as a sum of positive squares in 4 ways, for example, as 2713993216 + 26113913604 = 52096^2 + 161598^2 .

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 7 ways as a sum of consecutive naturals, for example, 7133601 + ... + 7137640.

It is an arithmetic number, because the mean of its divisors is an integer number (2547416697).

Almost surely, 2^28827906820 is an apocalyptic number.

28827906820 is a gapful number since it is divisible by the number (20) formed by its first and last digit.

It is an amenable number.

28827906820 is an abundant number, since it is smaller than the sum of its proper divisors (32310093908).

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

28827906820 is a wasteful number, since it uses less digits than its factorization.

28827906820 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 14271351 (or 14271349 counting only the distinct ones).

The product of its (nonzero) digits is 1548288, while the sum is 52.

The spelling of 28827906820 in words is "twenty-eight billion, eight hundred twenty-seven million, nine hundred six thousand, eight hundred twenty".