27708385880 has 64 divisors (see below), whose sum is σ = 71608320000. Its totient is φ = 9452260224.

The previous prime is 27708385879. The next prime is 27708385889. The reversal of 27708385880 is 8858380772.

It is a happy number.

It is a Harshad number since it is a multiple of its sum of digits (56).

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (27708385889) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (17) of ones.

It is a polite number, since it can be written in 15 ways as a sum of consecutive naturals, for example, 192920 + ... + 304359.

It is an arithmetic number, because the mean of its divisors is an integer number (1118880000).

Almost surely, 2^27708385880 is an apocalyptic number.

27708385880 is a gapful number since it is divisible by the number (20) formed by its first and last digit.

It is an amenable number.

27708385880 is an abundant number, since it is smaller than the sum of its proper divisors (43899934120).

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

27708385880 is a wasteful number, since it uses less digits than its factorization.

27708385880 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 497496 (or 497492 counting only the distinct ones).

The product of its (nonzero) digits is 6021120, while the sum is 56.

The spelling of 27708385880 in words is "twenty-seven billion, seven hundred eight million, three hundred eighty-five thousand, eight hundred eighty".