27878912790 has 16 divisors (see below), whose sum is σ = 66909390768. Its totient is φ = 7434376736.

The previous prime is 27878912783. The next prime is 27878912791. The reversal of 27878912790 is 9721987872.

It is a happy number.

It is a Smith number, since the sum of its digits (60) coincides with the sum of the digits of its prime factors. Since it is squarefree, it is also a hoax number.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (27878912791) 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, 464648517 + ... + 464648576.

It is an arithmetic number, because the mean of its divisors is an integer number (4181836923).

Almost surely, 2^27878912790 is an apocalyptic number.

27878912790 is an abundant number, since it is smaller than the sum of its proper divisors (39030477978).

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

27878912790 is a wasteful number, since it uses less digits than its factorization.

27878912790 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 929297103.

The product of its (nonzero) digits is 7112448, while the sum is 60.

The spelling of 27878912790 in words is "twenty-seven billion, eight hundred seventy-eight million, nine hundred twelve thousand, seven hundred ninety".