28382785420 has 48 divisors (see below), whose sum is σ = 65048020128. Its totient is φ = 10316943360.

The previous prime is 28382785391. The next prime is 28382785423. The reversal of 28382785420 is 2458728382.

It is not an unprimeable number, because it can be changed into a prime (28382785423) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (23) of ones.

It is a polite number, since it can be written in 15 ways as a sum of consecutive naturals, for example, 564844 + ... + 613036.

It is an arithmetic number, because the mean of its divisors is an integer number (1355167086).

Almost surely, 2^28382785420 is an apocalyptic number.

28382785420 is a gapful number since it is divisible by the number (20) formed by its first and last digit.

It is an amenable number.

28382785420 is an abundant number, since it is smaller than the sum of its proper divisors (36665234708).

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

28382785420 is a wasteful number, since it uses less digits than its factorization.

28382785420 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 50890 (or 50888 counting only the distinct ones).

The product of its (nonzero) digits is 1720320, while the sum is 49.

The spelling of 28382785420 in words is "twenty-eight billion, three hundred eighty-two million, seven hundred eighty-five thousand, four hundred twenty".