28071899678 has 8 divisors (see below), whose sum is σ = 42108686568. Its totient is φ = 14035670824.

The previous prime is 28071899677. The next prime is 28071899693. The reversal of 28071899678 is 87699817082.

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

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (28071899677) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (17) of ones.

It is a polite number, since it can be written in 3 ways as a sum of consecutive naturals, for example, 25100 + ... + 238272.

It is an arithmetic number, because the mean of its divisors is an integer number (5263585821).

Almost surely, 2^28071899678 is an apocalyptic number.

28071899678 is a deficient number, since it is larger than the sum of its proper divisors (14036786890).

28071899678 is a wasteful number, since it uses less digits than its factorization.

28071899678 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 279018.

The product of its (nonzero) digits is 24385536, while the sum is 65.

The spelling of 28071899678 in words is "twenty-eight billion, seventy-one million, eight hundred ninety-nine thousand, six hundred seventy-eight".