27840565830 has 128 divisors (see below), whose sum is σ = 83444898816. Its totient is φ = 5775321600.

The previous prime is 27840565829. The next prime is 27840565843. The reversal of 27840565830 is 3856504872.

It is a self number, because there is not a number n which added to its sum of digits gives 27840565830.

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 63 ways as a sum of consecutive naturals, for example, 1406200 + ... + 1425860.

It is an arithmetic number, because the mean of its divisors is an integer number (651913272).

Almost surely, 2^27840565830 is an apocalyptic number.

It is a practical number, because each smaller number is the sum of distinct divisors of 27840565830, and also a Zumkeller number, because its divisors can be partitioned in two sets with the same sum (41722449408).

27840565830 is an abundant number, since it is smaller than the sum of its proper divisors (55604332986).

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

27840565830 is a wasteful number, since it uses less digits than its factorization.

27840565830 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 20302.

The product of its (nonzero) digits is 1612800, while the sum is 48.

The spelling of 27840565830 in words is "twenty-seven billion, eight hundred forty million, five hundred sixty-five thousand, eight hundred thirty".