27731840880 has 80 divisors (see below), whose sum is σ = 85988603520. Its totient is φ = 7393446144.

The previous prime is 27731840879. The next prime is 27731840897. The reversal of 27731840880 is 8804813772.

It is a happy number.

It is a tau number, because it is divible by the number of its divisors (80).

It is a Harshad number since it is a multiple of its sum of digits (48).

It is a congruent number.

It is an unprimeable number.

It is a pernicious number, because its binary representation contains a prime number (19) of ones.

It is a polite number, since it can be written in 15 ways as a sum of consecutive naturals, for example, 1289899 + ... + 1311221.

It is an arithmetic number, because the mean of its divisors is an integer number (1074857544).

Almost surely, 2^27731840880 is an apocalyptic number.

27731840880 is a gapful number since it is divisible by the number (20) formed by its first and last digit.

It is an amenable number.

27731840880 is an abundant number, since it is smaller than the sum of its proper divisors (58256762640).

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

27731840880 is a wasteful number, since it uses less digits than its factorization.

27731840880 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 26758 (or 26752 counting only the distinct ones).

The product of its (nonzero) digits is 602112, while the sum is 48.

The spelling of 27731840880 in words is "twenty-seven billion, seven hundred thirty-one million, eight hundred forty thousand, eight hundred eighty".