27858536220 has 96 divisors (see below), whose sum is σ = 82061683200. Its totient is φ = 7051174144.

The previous prime is 27858536219. The next prime is 27858536243. The reversal of 27858536220 is 2263585872.

It is a super-3 number, since 3×27858536220³ (a number of 32 digits) contains 333 as substring.

It is a zygodrome in base 2.

It is a self number, because there is not a number n which added to its sum of digits gives 27858536220.

It is a congruent number.

It is an unprimeable number.

It is a polite number, since it can be written in 31 ways as a sum of consecutive naturals, for example, 33024 + ... + 238343.

It is an arithmetic number, because the mean of its divisors is an integer number (854809200).

Almost surely, 2^27858536220 is an apocalyptic number.

27858536220 is a gapful number since it is divisible by the number (20) formed by its first and last digit.

It is an amenable number.

It is a practical number, because each smaller number is the sum of distinct divisors of 27858536220, and also a Zumkeller number, because its divisors can be partitioned in two sets with the same sum (41030841600).

27858536220 is an abundant number, since it is smaller than the sum of its proper divisors (54203146980).

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

27858536220 is a wasteful number, since it uses less digits than its factorization.

27858536220 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 271467 (or 271465 counting only the distinct ones).

The product of its (nonzero) digits is 1612800, while the sum is 48.

The spelling of 27858536220 in words is "twenty-seven billion, eight hundred fifty-eight million, five hundred thirty-six thousand, two hundred twenty".