28809993678 has 8 divisors (see below), whose sum is σ = 57619987368. Its totient is φ = 9603331224.

The previous prime is 28809993677. The next prime is 28809993701. The reversal of 28809993678 is 87639990882.

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

28809993678 is an admirable number.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (28809993671) by changing a digit.

It is a polite number, since it can be written in 3 ways as a sum of consecutive naturals, for example, 2400832801 + ... + 2400832812.

It is an arithmetic number, because the mean of its divisors is an integer number (7202498421).

Almost surely, 2^28809993678 is an apocalyptic number.

28809993678 is a primitive abundant number, since it is smaller than the sum of its proper divisors, none of which is abundant.

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

28809993678 is a wasteful number, since it uses less digits than its factorization.

28809993678 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 4801665618.

The product of its (nonzero) digits is 94058496, while the sum is 69.

The spelling of 28809993678 in words is "twenty-eight billion, eight hundred nine million, nine hundred ninety-three thousand, six hundred seventy-eight".