28336654820 has 24 divisors (see below), whose sum is σ = 60175596600. Its totient is φ = 11207305472.

The previous prime is 28336654813. The next prime is 28336654837. The reversal of 28336654820 is 2845663382.

It can be written as a sum of positive squares in 4 ways, for example, as 4439823424 + 23896831396 = 66632^2 + 154586^2 .

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 7 ways as a sum of consecutive naturals, for example, 7957955 + ... + 7961514.

It is an arithmetic number, because the mean of its divisors is an integer number (2507316525).

Almost surely, 2^28336654820 is an apocalyptic number.

28336654820 is a gapful number since it is divisible by the number (20) formed by its first and last digit.

It is an amenable number.

28336654820 is an abundant number, since it is smaller than the sum of its proper divisors (31838941780).

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

28336654820 is a wasteful number, since it uses less digits than its factorization.

28336654820 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 15919567 (or 15919565 counting only the distinct ones).

The product of its (nonzero) digits is 1658880, while the sum is 47.

The spelling of 28336654820 in words is "twenty-eight billion, three hundred thirty-six million, six hundred fifty-four thousand, eight hundred twenty".