27828980789 has 8 divisors (see below), whose sum is σ = 28527047640. Its totient is φ = 27131833600.

The previous prime is 27828980759. The next prime is 27828980797. The reversal of 27828980789 is 98708982872.

It can be written as a sum of positive squares in 4 ways, for example, as 2812180900 + 25016799889 = 53030^2 + 158167^2 .

It is a sphenic number, since it is the product of 3 distinct primes.

It is a cyclic number.

It is not a de Polignac number, because 27828980789 - 2³² = 23534013493 is a prime.

It is a Duffinian number.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (27828980749) by changing a digit.

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 7 ways as a sum of consecutive naturals, for example, 168434 + ... + 289875.

It is an arithmetic number, because the mean of its divisors is an integer number (3565880955).

Almost surely, 2^27828980789 is an apocalyptic number.

It is an amenable number.

27828980789 is a deficient number, since it is larger than the sum of its proper divisors (698066851).

27828980789 is a wasteful number, since it uses less digits than its factorization.

27828980789 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 459831.

The product of its (nonzero) digits is 65028096, while the sum is 68.

The spelling of 27828980789 in words is "twenty-seven billion, eight hundred twenty-eight million, nine hundred eighty thousand, seven hundred eighty-nine".