28821566802 has 16 divisors (see below), whose sum is σ = 65877867072. Its totient is φ = 8234733360.

The previous prime is 28821566789. The next prime is 28821566803. The reversal of 28821566802 is 20866512882.

It is a happy number.

It is not an unprimeable number, because it can be changed into a prime (28821566803) by changing a digit.

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, 343113849 + ... + 343113932.

It is an arithmetic number, because the mean of its divisors is an integer number (4117366692).

Almost surely, 2^28821566802 is an apocalyptic number.

28821566802 is an abundant number, since it is smaller than the sum of its proper divisors (37056300270).

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

28821566802 is a wasteful number, since it uses less digits than its factorization.

28821566802 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 686227793.

The product of its (nonzero) digits is 737280, while the sum is 48.

The spelling of 28821566802 in words is "twenty-eight billion, eight hundred twenty-one million, five hundred sixty-six thousand, eight hundred two".