28055850320 has 20 divisors (see below), whose sum is σ = 65229852180. Its totient is φ = 11222340096.

The previous prime is 28055850313. The next prime is 28055850323. The reversal of 28055850320 is 2305855082.

It can be written as a sum of positive squares in 2 ways, for example, as 4491144256 + 23564706064 = 67016^2 + 153508^2 .

It is a tau number, because it is divible by the number of its divisors (20).

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (28055850323) 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, 175348985 + ... + 175349144.

It is an arithmetic number, because the mean of its divisors is an integer number (3261492609).

Almost surely, 2^28055850320 is an apocalyptic number.

28055850320 is a gapful number since it is divisible by the number (20) formed by its first and last digit.

It is an amenable number.

28055850320 is an abundant number, since it is smaller than the sum of its proper divisors (37174001860).

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

28055850320 is a wasteful number, since it uses less digits than its factorization.

28055850320 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 350698142 (or 350698136 counting only the distinct ones).

The product of its (nonzero) digits is 96000, while the sum is 38.

The spelling of 28055850320 in words is "twenty-eight billion, fifty-five million, eight hundred fifty thousand, three hundred twenty".