27730220860 has 24 divisors (see below), whose sum is σ = 58440712176. Its totient is φ = 11052612480.

The previous prime is 27730220813. The next prime is 27730220863. The reversal of 27730220860 is 6802203772.

It is a happy number.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (27730220863) by changing a digit.

It is a polite number, since it can be written in 7 ways as a sum of consecutive naturals, for example, 2461482 + ... + 2472721.

It is an arithmetic number, because the mean of its divisors is an integer number (2435029674).

Almost surely, 2^27730220860 is an apocalyptic number.

27730220860 is a gapful number since it is divisible by the number (20) formed by its first and last digit.

It is an amenable number.

27730220860 is an abundant number, since it is smaller than the sum of its proper divisors (30710491316).

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

27730220860 is a wasteful number, since it uses less digits than its factorization.

27730220860 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 4934493 (or 4934491 counting only the distinct ones).

The product of its (nonzero) digits is 56448, while the sum is 37.

The spelling of 27730220860 in words is "twenty-seven billion, seven hundred thirty million, two hundred twenty thousand, eight hundred sixty".