27786740380 has 144 divisors (see below), whose sum is σ = 74525282496. Its totient is φ = 8494295040.

The previous prime is 27786740351. The next prime is 27786740407. The reversal of 27786740380 is 8304768772.

It is a congruent number.

It is an unprimeable number.

It is a polite number, since it can be written in 47 ways as a sum of consecutive naturals, for example, 843010 + ... + 875350.

It is an arithmetic number, because the mean of its divisors is an integer number (517536684).

Almost surely, 2^27786740380 is an apocalyptic number.

27786740380 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 27786740380, and also a Zumkeller number, because its divisors can be partitioned in two sets with the same sum (37262641248).

27786740380 is an abundant number, since it is smaller than the sum of its proper divisors (46738542116).

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

27786740380 is a wasteful number, since it uses less digits than its factorization.

27786740380 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 32412 (or 32391 counting only the distinct ones).

The product of its (nonzero) digits is 3161088, while the sum is 52.

The spelling of 27786740380 in words is "twenty-seven billion, seven hundred eighty-six million, seven hundred forty thousand, three hundred eighty".