27806057720 has 32 divisors (see below), whose sum is σ = 71501292000. Its totient is φ = 9533505408.

The previous prime is 27806057711. The next prime is 27806057731. The reversal of 27806057720 is 2775060872.

It is a happy number.

It is a congruent number.

It is an unprimeable number.

It is a polite number, since it can be written in 7 ways as a sum of consecutive naturals, for example, 49653395 + ... + 49653954.

It is an arithmetic number, because the mean of its divisors is an integer number (2234415375).

Almost surely, 2^27806057720 is an apocalyptic number.

27806057720 is a gapful number since it is divisible by the number (20) formed by its first and last digit.

It is an amenable number.

27806057720 is an abundant number, since it is smaller than the sum of its proper divisors (43695234280).

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

27806057720 is a wasteful number, since it uses less digits than its factorization.

27806057720 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 99307367 (or 99307363 counting only the distinct ones).

The product of its (nonzero) digits is 329280, while the sum is 44.

The spelling of 27806057720 in words is "twenty-seven billion, eight hundred six million, fifty-seven thousand, seven hundred twenty".