27800738812 has 72 divisors (see below), whose sum is σ = 61205161472. Its totient is φ = 10815599520.

The previous prime is 27800738767. The next prime is 27800738813. The reversal of 27800738812 is 21883700872.

It is a hoax number, since the sum of its digits (46) coincides with the sum of the digits of its distinct prime factors.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (27800738813) by changing a digit.

It is a polite number, since it can be written in 23 ways as a sum of consecutive naturals, for example, 2457433 + ... + 2468719.

Almost surely, 2^27800738812 is an apocalyptic number.

27800738812 is a gapful number since it is divisible by the number (22) 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 27800738812, and also a Zumkeller number, because its divisors can be partitioned in two sets with the same sum (30602580736).

27800738812 is an abundant number, since it is smaller than the sum of its proper divisors (33404422660).

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

27800738812 is a wasteful number, since it uses less digits than its factorization.

27800738812 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 12047 (or 12034 counting only the distinct ones).

The product of its (nonzero) digits is 301056, while the sum is 46.

The spelling of 27800738812 in words is "twenty-seven billion, eight hundred million, seven hundred thirty-eight thousand, eight hundred twelve".