28728728587158 has 8 divisors (see below), whose sum is σ = 57457457174328. Its totient is φ = 9576242862384.

The previous prime is 28728728587151. The next prime is 28728728587159. The reversal of 28728728587158 is 85178582782782.

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

28728728587158 is an admirable number.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (28728728587151) 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, 2394060715591 + ... + 2394060715602.

It is an arithmetic number, because the mean of its divisors is an integer number (7182182146791).

Almost surely, 2^{28728728587158} is an apocalyptic number.

28728728587158 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.

28728728587158 is a wasteful number, since it uses less digits than its factorization.

28728728587158 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 4788121431198.

The product of its digits is 2247884800, while the sum is 78.

The spelling of 28728728587158 in words is "twenty-eight trillion, seven hundred twenty-eight billion, seven hundred twenty-eight million, five hundred eighty-seven thousand, one hundred fifty-eight".