28045084420 has 12 divisors (see below), whose sum is σ = 58894677324. Its totient is φ = 11218033760.

The previous prime is 28045084393. The next prime is 28045084421. The reversal of 28045084420 is 2448054082.

It can be written as a sum of positive squares in 2 ways, for example, as 12212902144 + 15832182276 = 110512^2 + 125826^2 .

It is a self number, because there is not a number n which added to its sum of digits gives 28045084420.

It is not an unprimeable number, because it can be changed into a prime (28045084421) by changing a digit.

It is a polite number, since it can be written in 3 ways as a sum of consecutive naturals, for example, 701127091 + ... + 701127130.

It is an arithmetic number, because the mean of its divisors is an integer number (4907889777).

Almost surely, 2^28045084420 is an apocalyptic number.

28045084420 is a gapful number since it is divisible by the number (20) formed by its first and last digit.

It is an amenable number.

28045084420 is an abundant number, since it is smaller than the sum of its proper divisors (30849592904).

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

28045084420 is a wasteful number, since it uses less digits than its factorization.

28045084420 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 1402254230 (or 1402254228 counting only the distinct ones).

The product of its (nonzero) digits is 81920, while the sum is 37.

The spelling of 28045084420 in words is "twenty-eight billion, forty-five million, eighty-four thousand, four hundred twenty".