28677582820 has 12 divisors (see below), whose sum is σ = 60222923964. Its totient is φ = 11471033120.

The previous prime is 28677582779. The next prime is 28677582887. The reversal of 28677582820 is 2828577682.

It can be written as a sum of positive squares in 2 ways, for example, as 22248108964 + 6429473856 = 149158^2 + 80184^2 .

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, 716939551 + ... + 716939590.

It is an arithmetic number, because the mean of its divisors is an integer number (5018576997).

Almost surely, 2^28677582820 is an apocalyptic number.

28677582820 is a gapful number since it is divisible by the number (20) formed by its first and last digit.

It is an amenable number.

28677582820 is an abundant number, since it is smaller than the sum of its proper divisors (31545341144).

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

28677582820 is a wasteful number, since it uses less digits than its factorization.

28677582820 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 1433879150 (or 1433879148 counting only the distinct ones).

The product of its (nonzero) digits is 6021120, while the sum is 55.

The spelling of 28677582820 in words is "twenty-eight billion, six hundred seventy-seven million, five hundred eighty-two thousand, eight hundred twenty".