28345084220 has 24 divisors (see below), whose sum is σ = 59570910000. Its totient is φ = 11329227392.

The previous prime is 28345084219. The next prime is 28345084289. The reversal of 28345084220 is 2248054382.

It is a congruent number.

It is an unprimeable number.

It is a polite number, since it can be written in 7 ways as a sum of consecutive naturals, for example, 523970 + ... + 575529.

It is an arithmetic number, because the mean of its divisors is an integer number (2482121250).

Almost surely, 2^28345084220 is an apocalyptic number.

28345084220 is a gapful number since it is divisible by the number (20) formed by its first and last digit.

It is an amenable number.

28345084220 is an abundant number, since it is smaller than the sum of its proper divisors (31225825780).

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

28345084220 is a wasteful number, since it uses less digits than its factorization.

28345084220 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 1100797 (or 1100795 counting only the distinct ones).

The product of its (nonzero) digits is 122880, while the sum is 38.

The spelling of 28345084220 in words is "twenty-eight billion, three hundred forty-five million, eighty-four thousand, two hundred twenty".