27821262868 has 48 divisors (see below), whose sum is σ = 57581758080. Its totient is φ = 11508142464.

The previous prime is 27821262863. The next prime is 27821262869. The reversal of 27821262868 is 86826212872.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (27821262863) by changing a digit.

It is a polite number, since it can be written in 15 ways as a sum of consecutive naturals, for example, 3538830 + ... + 3546682.

It is an arithmetic number, because the mean of its divisors is an integer number (1199619960).

Almost surely, 2^27821262868 is an apocalyptic number.

27821262868 is a gapful number since it is divisible by the number (28) formed by its first and last digit.

It is an amenable number.

27821262868 is an abundant number, since it is smaller than the sum of its proper divisors (29760495212).

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

27821262868 is a wasteful number, since it uses less digits than its factorization.

27821262868 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 12256 (or 12254 counting only the distinct ones).

The product of its digits is 2064384, while the sum is 52.

The spelling of 27821262868 in words is "twenty-seven billion, eight hundred twenty-one million, two hundred sixty-two thousand, eight hundred sixty-eight".