27728630440 has 32 divisors (see below), whose sum is σ = 71302193280. Its totient is φ = 9506958912.

The previous prime is 27728630437. The next prime is 27728630441. The reversal of 27728630440 is 4403682772.

It is not an unprimeable number, because it can be changed into a prime (27728630441) 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, 49515132 + ... + 49515691.

It is an arithmetic number, because the mean of its divisors is an integer number (2228193540).

Almost surely, 2^27728630440 is an apocalyptic number.

27728630440 is a gapful number since it is divisible by the number (20) formed by its first and last digit.

It is an amenable number.

27728630440 is an abundant number, since it is smaller than the sum of its proper divisors (43573562840).

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

27728630440 is a wasteful number, since it uses less digits than its factorization.

27728630440 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 99030841 (or 99030837 counting only the distinct ones).

The product of its (nonzero) digits is 451584, while the sum is 43.

The spelling of 27728630440 in words is "twenty-seven billion, seven hundred twenty-eight million, six hundred thirty thousand, four hundred forty".