28728386650 has 48 divisors (see below), whose sum is σ = 58061640960. Its totient is φ = 10535356800.

The previous prime is 28728386623. The next prime is 28728386651. The reversal of 28728386650 is 5668382782.

It is a junction number, because it is equal to n+sod(n) for n = 28728386591 and 28728386600.

It is not an unprimeable number, because it can be changed into a prime (28728386651) by changing a digit.

It is a polite number, since it can be written in 23 ways as a sum of consecutive naturals, for example, 458299 + ... + 517198.

It is an arithmetic number, because the mean of its divisors is an integer number (1209617520).

Almost surely, 2^28728386650 is an apocalyptic number.

28728386650 is an abundant number, since it is smaller than the sum of its proper divisors (29333254310).

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

28728386650 is a wasteful number, since it uses less digits than its factorization.

28728386650 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 975559 (or 975554 counting only the distinct ones).

The product of its (nonzero) digits is 7741440, while the sum is 55.

The spelling of 28728386650 in words is "twenty-eight billion, seven hundred twenty-eight million, three hundred eighty-six thousand, six hundred fifty".