27730447720 has 64 divisors (see below), whose sum is σ = 66865979520. Its totient is φ = 10323143424.

The previous prime is 27730447687. The next prime is 27730447727. The reversal of 27730447720 is 2774403772.

It is not an unprimeable number, because it can be changed into a prime (27730447727) 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, 373282 + ... + 441361.

It is an arithmetic number, because the mean of its divisors is an integer number (1044780930).

Almost surely, 2^27730447720 is an apocalyptic number.

27730447720 is a gapful number since it is divisible by the number (20) formed by its first and last digit.

It is an amenable number.

27730447720 is an abundant number, since it is smaller than the sum of its proper divisors (39135531800).

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

27730447720 is a wasteful number, since it uses less digits than its factorization.

27730447720 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 814714 (or 814710 counting only the distinct ones).

The product of its (nonzero) digits is 460992, while the sum is 43.

The spelling of 27730447720 in words is "twenty-seven billion, seven hundred thirty million, four hundred forty-seven thousand, seven hundred twenty".