28312820384 has 12 divisors (see below), whose sum is σ = 55740865194. Its totient is φ = 14156410176.

The previous prime is 28312820383. The next prime is 28312820407. The reversal of 28312820384 is 48302821382.

It is a happy number.

It can be written as a sum of positive squares in only one way, i.e., 25527091984 + 2785728400 = 159772^2 + 52780^2 .

It is not an unprimeable number, because it can be changed into a prime (28312820383) by changing a digit.

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 as a sum of consecutive naturals, namely, 442387787 + ... + 442387850.

Almost surely, 2^28312820384 is an apocalyptic number.

It is an amenable number.

28312820384 is a deficient number, since it is larger than the sum of its proper divisors (27428044810).

28312820384 is an equidigital number, since it uses as much as digits as its factorization.

28312820384 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 884775647 (or 884775639 counting only the distinct ones).

The product of its (nonzero) digits is 147456, while the sum is 41.

The spelling of 28312820384 in words is "twenty-eight billion, three hundred twelve million, eight hundred twenty thousand, three hundred eighty-four".